Introduction

Some of the world’s most interesting companies do not begin with billion-dollar ambitions. They begin by solving a simple, everyday problem.

The story of Sunstar Group is a strong example of this entrepreneurial journey. What started in Japan in the early 20th century as a small business connected to bicycle repair products gradually evolved into an international company with businesses spanning oral care, health and beauty, and industrial products.

Sunstar’s journey is particularly interesting because its growth was not based on a single breakthrough. Instead, the company developed through a combination of product innovation, scientific research, diversification, international expansion, and a long-term focus on customer needs.

This case study examines how Sunstar evolved from its humble beginnings, why it entered the oral healthcare market, how it expanded internationally, what challenges it faced, and what entrepreneurs can learn from its business strategy.

Sunstar Group Case Study

Sunstar Group at a Glance

Particular	Details
Company	Sunstar Group
Origin	Japan
Founded	1932
Founder	Kunio Kaneda
Headquarters	Etoy, Switzerland
Major Business Areas	Oral Care, Health & Beauty, Industrial
Business Model	Consumer products + B2B industrial solutions
Global Reach	International markets across multiple regions
Core Strengths	Innovation, research, healthcare, diversification

Sunstar has developed into a diversified global organization rather than remaining limited to its original bicycle-related business.

Its portfolio today reflects a broader philosophy: using science and technology to improve people’s health, quality of life, and everyday products.

1. The Beginning: A Small Business in Japan

Sunstar’s history goes back to 1932, when Kunio Kaneda started a business in Osaka, Japan.

The original business was associated with products used for bicycle maintenance and repair.

At first glance, bicycle repair and modern oral healthcare may appear to have little connection. However, one important capability developed during this early period would eventually become significant for Sunstar: packaging and dispensing products in tubes.

The bicycle business gave the company an opportunity to understand manufacturing, packaging, distribution, and consumer demand.

Rather than remaining dependent on one product category, the company eventually began looking for ways to apply its capabilities to other markets.

This willingness to explore new opportunities became one of the defining characteristics of Sunstar’s development.

2. From Bicycle Products to Toothpaste

The transition into oral care was a major turning point.

Sunstar recognized that the technology and packaging knowledge associated with its earlier products could potentially be applied to toothpaste.

This was a strategically important move because toothpaste offered a much larger consumer market and created opportunities for repeat purchases.

Instead of simply remaining a manufacturer of bicycle-related products, Sunstar began building capabilities in a completely different consumer category.

This illustrates an important entrepreneurial principle:

A company’s existing technology or capability can sometimes create opportunities far beyond its original market.

The move into toothpaste helped establish the foundation for Sunstar’s future as an oral healthcare company.

3. Building a Position in Oral Healthcare

Oral care eventually became one of Sunstar’s most important areas of business.

The company did not approach oral healthcare simply as a consumer-goods category. It increasingly emphasized dental science, prevention, professional recommendations, and oral health education.

This helped move the brand beyond the traditional idea of selling toothpaste and toothbrushes.

Sunstar developed products and solutions across areas such as:

Toothpaste
Toothbrushes
Mouthwash
Interdental cleaning
Gum-care products
Professional dental products
Oral-health solutions

The company’s oral-care portfolio has also included brands and products designed for different consumer and professional needs.

The broader strategy was to address oral health as an ecosystem rather than focusing on one product.

4. Why Oral Care Became a Strategic Opportunity

There were several reasons why oral care was an attractive market for Sunstar.

Recurring Consumer Demand

Toothpaste, toothbrushes, and oral hygiene products are used regularly.

This creates the potential for recurring purchases and long-term customer relationships.

Growing Awareness of Preventive Healthcare

Consumers increasingly began to understand that oral health is closely connected to overall health and well-being.

This created opportunities for companies that could provide scientifically supported oral-health products.

Professional Influence

Dentists and dental professionals play an important role in recommending oral-care products.

Sunstar’s emphasis on professional and scientific credibility helped differentiate its products from purely marketing-driven consumer brands.

Product Innovation

Oral care provides continuous opportunities for innovation, including:

Specialized toothbrush designs
Interdental cleaning
Gum-care products
Functional toothpaste
Professional dental solutions

This made oral healthcare a market where research and innovation could create competitive advantages.

5. From a Single Business to a Diversified Group

Sunstar’s transformation did not stop with oral care.

Over time, the company developed businesses across three broad areas:

A. Oral Care

This remains one of Sunstar’s most recognizable business areas.

Its oral-care activities include consumer and professional products designed to support:

Daily oral hygiene
Gum health
Plaque control
Interdental cleaning
Professional dental care

B. Health & Beauty

Sunstar also developed products and businesses connected with health, wellness, and beauty.

This expansion allowed the company to apply its knowledge and technology to consumer needs beyond traditional oral hygiene.

The broader health and beauty category can include areas such as:

Personal care
Wellness
Health-oriented products
Beauty-related solutions

The strategic logic was to remain close to the company’s broader purpose of improving people’s quality of life.

C. Industrial Business

Perhaps the most surprising part of Sunstar’s business model is its industrial division.

The company also operates in areas involving adhesives, sealants, polymers, and other specialized materials.

These technologies can serve industries such as:

Automotive
Construction
Electronics
Transportation
Manufacturing

This means Sunstar operates not only as a consumer healthcare company but also as a technology and materials solutions provider.

That diversification makes the company’s business model particularly interesting.

6. The Power of Diversification

Sunstar’s business structure demonstrates how diversification can support long-term resilience.

Imagine a company that depends entirely on one consumer product.

If consumer preferences change, competition increases, or the market declines, the entire business can be affected.

Sunstar reduced this dependency by operating across different categories.

Consumer Businesses

Oral care
Health
Beauty

Industrial Businesses

Adhesives
Sealants
Specialized materials
Industrial applications

The markets are different, but they share an important characteristic: Sunstar can use science, technology, manufacturing capabilities, and innovation across multiple applications.

This creates a more balanced business model.

7. International Expansion

As Sunstar developed its products and technologies, the company expanded beyond Japan.

Internationalization became an important component of its long-term strategy.

The company established operations, partnerships, manufacturing capabilities, and distribution networks in different parts of the world.

Its international presence grew across markets including:

Asia
Europe
North America
Other global markets

The company also developed international research and business capabilities.

A significant aspect of this strategy was establishing a stronger global organizational structure, including its headquarters in Switzerland.

This helped support Sunstar’s development as a multinational organization rather than a Japan-focused company.

8. The Role of Acquisitions and Partnerships

Organic growth is not always enough for a company seeking international expansion.

Businesses can enter new markets faster through:

Acquisitions
Strategic partnerships
Joint ventures
Distribution agreements
Local subsidiaries

Sunstar has used various forms of international business development to strengthen its global presence.

Acquisitions can provide several advantages:

Immediate Market Access

Instead of building a customer base from zero, an acquisition can provide an established presence.

Technology

Companies can acquire specialized technologies and technical expertise.

Talent

Acquisitions can bring experienced employees and management teams into the organization.

Brand Portfolio

A company can expand its product portfolio much faster through strategic acquisitions.

For a diversified company like Sunstar, these approaches can accelerate growth while reducing the time required to build capabilities internally.

9. Research and Development as a Competitive Advantage

One of Sunstar’s most important long-term strategies has been its emphasis on research and development.

In healthcare-related industries, consumers and professionals increasingly demand evidence, effectiveness, and product safety.

That makes scientific research particularly important.

Sunstar’s research activities have focused on areas such as:

Oral health
Dental science
Healthcare technologies
Materials science
Industrial chemistry
Product development

R&D creates an important competitive barrier.

A competitor may be able to copy packaging or marketing quickly, but developing scientific knowledge, technical expertise, patents, manufacturing processes, and professional credibility can take years.

10. Customer-Centric Innovation

Another important lesson from Sunstar’s development is the importance of understanding the customer’s actual problem.

Successful innovation is not simply:

“What product can we manufacture?”

A better question is:

“What problem does the customer need us to solve?”

In oral healthcare, customers may need solutions for:

Sensitive teeth
Gum problems
Plaque
Difficult-to-clean areas
Interdental hygiene
Professional dental care

In industrial markets, customers may need:

Stronger bonding
Better sealing
Lightweight materials
Improved durability
Manufacturing efficiency

These are fundamentally different problems.

Sunstar’s diversified structure allows the company to develop specialized solutions for different customer groups.

11. Professional Healthcare Relationships

Oral care is different from many conventional consumer-product industries because healthcare professionals can significantly influence purchasing decisions.

Dentists, hygienists, researchers, and other professionals can contribute to:

Product development
Clinical research
Product recommendations
Consumer education
Scientific credibility

Building relationships with the professional dental community can therefore strengthen a company’s position in the market.

Sunstar’s focus on professional oral healthcare has helped it develop beyond a conventional mass-market consumer brand.

12. Sustainability and Social Responsibility

Long-term companies increasingly need to consider not only financial performance but also their environmental and social impact.

Sunstar has incorporated sustainability into areas such as:

Environmental Responsibility

Resource efficiency
Reduction of environmental impact
Sustainable manufacturing
Waste reduction
Energy management

Social Responsibility

Sunstar’s broader healthcare mission also connects with activities related to:

Oral-health education
Community health
Public awareness
Professional education
Employee development

For a healthcare-oriented organization, social responsibility is especially relevant because the company’s products directly relate to people’s health and well-being.

13. Challenges Faced by Sunstar

Sunstar’s long history does not mean that the company has operated without challenges.

A business operating for more than nine decades must continuously adapt to changing economic, technological, and consumer conditions.

Challenge 1: Intense Competition

The oral-care market contains major international brands with substantial:

Advertising budgets
Distribution networks
Research capabilities
Retail relationships

Sunstar therefore needs continuous innovation to maintain differentiation.

Challenge 2: Changing Consumer Expectations

Today’s consumers increasingly consider factors beyond price and functionality.

They may also evaluate:

Product ingredients
Sustainability
Packaging
Brand reputation
Scientific evidence
Ethical business practices

This forces companies to continually adapt.

Challenge 3: Global Supply Chains

International companies depend on complex supply chains.

Disruptions can affect:

Raw materials
Manufacturing
Transportation
Inventory
Product availability

Global diversification creates opportunities, but it also introduces operational complexity.

Challenge 4: Regulatory Requirements

Healthcare and industrial products are subject to regulations that vary across countries.

A global organization must manage different:

Product standards
Safety requirements
Labeling regulations
Environmental rules
Import/export requirements

Regulatory compliance therefore becomes an important component of international operations.

14. Sunstar’s Business Model

Sunstar’s business model can be understood through four major components.

1. Consumer Products

The company develops products that reach individual consumers through retail and other distribution channels.

2. Professional Healthcare

Sunstar also serves dental professionals with specialized oral-care products and solutions.

3. Industrial Solutions

Its industrial business serves companies requiring specialized materials and technologies.

4. Research-Driven Innovation

Research and development connects these different businesses by creating new technologies and products.

This combination gives Sunstar a distinctive position between consumer healthcare and industrial technology.

Here is a more detailed and professionally structured version of Section 15, with stronger business analysis and clearer explanations of how each factor contributed to Sunstar’s long-term success.

15. What Made Sunstar Successful?

Sunstar’s transformation from a small Japanese business into a diversified international organization did not happen because of one successful product or one major business decision. Its growth was the result of several interconnected factors that developed over many decades.

The company consistently demonstrated an ability to adapt to changing markets, invest in innovation, diversify strategically, think internationally, and maintain a long-term perspective.

These factors helped Sunstar remain competitive while moving from its original bicycle-related business into oral healthcare, health and beauty, and industrial solutions.

1. Ability to Adapt

One of the most important reasons behind Sunstar’s longevity is its ability to adapt.

When the company was founded, its business was connected to bicycle repair products. However, Sunstar did not treat its original business model as something permanent.

Instead, the company recognized that its existing capabilities could potentially be applied to new opportunities.

This willingness to change allowed Sunstar to move into oral care and eventually develop businesses across multiple industries.

Why Adaptability Matters

Markets are never static.

Customer preferences change, technologies evolve, competitors enter the market, and new regulations emerge. A company that continues operating exactly as it did decades earlier can eventually lose its relevance.

Sunstar’s history demonstrates a different approach:

Existing capability → New opportunity → Product innovation → New market → Further growth

This ability to recognize opportunities outside the company’s original market helped Sunstar avoid becoming dependent on a single product category.

Lesson for Businesses

Entrepreneurs should not ask only:

“How can we sell more of our existing product?”

They should also ask:

“How are customer needs changing, and how can our existing capabilities help us respond?”

Adaptability allows businesses to survive changes rather than simply react to them.

2. Innovation

Innovation has been another major component of Sunstar’s development.

The company expanded beyond its original products by applying technology, research, and product-development capabilities to new customer problems.

In particular, Sunstar developed significant expertise in oral healthcare and scientific research, allowing it to compete on more than price or basic product functionality.

Innovation Across Different Areas

Sunstar’s innovation has involved areas such as:

Oral healthcare
Dental products
Preventive health
Consumer products
Industrial materials
Adhesive and sealing technologies
Manufacturing processes

This demonstrates that innovation does not necessarily mean inventing an entirely new industry.

Innovation can also mean:

Improving an existing product
Making a product easier to use
Solving a specific customer problem
Developing better materials
Improving manufacturing
Creating scientifically supported solutions

Research Creates Long-Term Advantages

One of the strongest advantages of research-driven innovation is that competitors cannot easily reproduce it.

A competitor may be able to copy the appearance of a product, but developing the underlying:

Technology
Research
Expertise
Manufacturing process
Intellectual property
Scientific knowledge

can take considerably longer.

Lesson for Businesses

Companies should treat innovation as an ongoing process rather than a one-time event.

Today’s successful product must become tomorrow’s improved product.

3. Strategic Diversification

Another major factor in Sunstar’s success is diversification.

Instead of relying exclusively on one business, Sunstar developed operations across several areas, including:

Oral care
Health and beauty
Industrial products and technologies

This gave the company exposure to different markets and customer groups.

Why Diversification Matters

Consider a company that earns almost all of its revenue from one product.

If demand for that product falls, the company’s entire business can be affected.

Diversification can reduce this concentration risk.

For Sunstar, consumer healthcare and industrial businesses operate in different market environments. This provides a broader business base and creates additional opportunities for growth.

However, Diversification Must Be Strategic

Diversification does not mean entering every possible industry.

Unrelated expansion can create:

Higher operating costs
Management complexity
Brand confusion
Increased financial risk
Difficulty maintaining expertise

The more effective approach is capability-based diversification.

In other words:

What does the company already know how to do exceptionally well?

Then:

Where else can those capabilities create value?

Sunstar’s businesses have connections through areas such as science, technology, manufacturing, product development, and materials expertise.

Lesson for Entrepreneurs

Do not diversify simply because another market looks profitable.

Diversify where your existing capabilities create a competitive advantage.

4. Global Thinking

Sunstar also demonstrated the importance of thinking beyond its domestic market.

The company originated in Japan but gradually developed an international presence across multiple regions.

International expansion allowed Sunstar to access:

Larger customer markets
New business opportunities
International talent
New technologies
Different customer needs
Global distribution networks

The development of an international organizational structure, including its presence and headquarters functions in Switzerland, further supported its global ambitions.

Global Expansion Is More Than Selling Overseas

A truly global business needs more than international sales.

It may require:

Local market knowledge
International distribution
Regional operations
Manufacturing capabilities
Research facilities
Local partnerships
Regulatory expertise
Adaptation to cultural differences

Sunstar’s international development reflects this broader approach to globalization.

Lesson for Startups

Entrepreneurs should think about global opportunities early, even if they initially operate in only one country.

The question should be:

“Can this business eventually solve this problem for customers in other markets?”

Thinking globally can influence product design, technology, branding, and scalability from the beginning.

5. Long-Term Orientation

Perhaps the most important factor behind Sunstar’s success is its long-term perspective.

Sunstar has operated for more than nine decades. Maintaining relevance for such a long period requires more than short-term sales growth.

A company must continually invest in its future.

This includes:

Research and development
Product innovation
Employee capabilities
Brand reputation
Customer relationships
Manufacturing
Technology
Sustainability
International development

Short-Term vs. Long-Term Thinking

A short-term business might ask:

“How can we maximize this year’s revenue?”

A long-term business also asks:

“What capabilities do we need to remain successful ten or twenty years from now?”

That difference can significantly influence business decisions.

Sunstar’s long history illustrates the importance of continuously reinventing the organization while retaining the capabilities and values that remain relevant.

6. Customer Trust

Another important element of Sunstar’s development is the importance of trust, particularly because a significant part of its business is connected to healthcare.

Consumers expect healthcare and oral-care products to be:

Reliable
Safe
Effective
High quality
Scientifically supported

Trust therefore becomes more than a marketing advantage.

It becomes a business asset.

When customers trust a brand, they are more likely to:

Purchase repeatedly
Recommend products
Try new products from the same company
Remain loyal over time

For a company operating in healthcare-related markets, maintaining credibility can be especially important.

Lesson for Entrepreneurs

A startup should not focus only on acquiring customers.

It should focus on creating reasons for customers to continue trusting the company.

7. Combination of Consumer and Industrial Businesses

Sunstar’s business structure is also unusual because it combines consumer-facing healthcare products with industrial technologies.

These businesses serve very different customers.

Consumer Side

The company interacts with consumers through areas such as oral and personal care.

Industrial Side

The company provides specialized technologies and materials to business customers.

This combination creates a broader portfolio of capabilities and markets.

It also demonstrates that companies do not necessarily need to choose between being a consumer brand and a technology company.

They can build expertise that supports both.

8. Strong Organizational Capabilities

Long-term growth requires more than good products.

A company also needs strong capabilities in:

Manufacturing
Supply chain management
Research
Marketing
Distribution
International operations
Talent management
Product development

Sunstar’s long history indicates that it successfully developed organizational capabilities alongside its product portfolio.

This is particularly important as companies become larger.

A startup may initially depend heavily on its founders.

A global company, however, needs systems and teams capable of operating at scale.

9. Ability to Reinvent Without Losing Its Core Strengths

One of Sunstar’s most interesting characteristics is that the company has repeatedly changed while retaining important underlying capabilities.

Its products and markets have evolved considerably, but capabilities such as innovation, technology, manufacturing, and customer-focused product development remain relevant.

This creates a useful strategic principle:

Successful companies do not necessarily preserve their original products; they preserve and strengthen the capabilities that allow them to create value.

This distinction is critical.

A company that protects only its existing products can become outdated.

A company that protects and develops its underlying capabilities can create new products when markets change.

10. Sunstar’s Success Formula

The factors behind Sunstar’s development can be summarized as:

Adaptability
↓
Innovation
↓
Customer Trust
↓
Strategic Diversification
↓
Global Expansion
↓
Continuous Investment
↓
Long-Term Thinking
↓
Sustainable Business Growth

These factors are interconnected.

Innovation creates new opportunities.

Adaptability allows the company to respond to changing markets.

Diversification creates additional growth opportunities.

Global expansion increases the potential customer base.

Customer trust strengthens the brand.

Long-term investment allows the company to continue developing.

Together, these factors help explain how Sunstar was able to evolve over multiple generations.

Key Takeaway

Sunstar’s success cannot be attributed to simply having a good product.

Its greater competitive advantage came from building a company capable of changing, learning, innovating, and expanding over time.

The most important lesson for entrepreneurs is:

Don’t build a business that depends only on today’s product. Build capabilities that allow the business to create tomorrow’s products.

Sunstar’s journey demonstrates that a small company can evolve into a global organization when it combines adaptability, innovation, strategic diversification, customer trust, global thinking, and long-term investment.

That is what makes Sunstar’s story more than just a company-history case study—it is a practical example of how businesses can remain relevant across generations.

16. Sunstar’s Transformation in Simple Terms

The entire journey can be summarized as a sequence of strategic transformations:

Bicycle Repair Products

↓

Packaging & Manufacturing Expertise

↓

Toothpaste

↓

Oral Care

↓

Healthcare & Beauty

↓

Industrial Materials & Technology

↓

Global Diversified Business

This progression demonstrates how a company can evolve by identifying new applications for its existing capabilities.

17. Key Lessons for Entrepreneurs

Sunstar’s story provides several useful lessons for entrepreneurs and startup founders.

Lesson 1: Start With a Real Problem

Sunstar began with a practical need: bicycle repair.

Successful businesses often begin by solving a specific customer problem rather than trying to build a huge company immediately.

Lesson 2: Look Beyond Your Original Product

Your first product does not necessarily have to define your company forever.

Entrepreneurs should continuously ask:

“What other problems can our technology, skills, or customer knowledge solve?”

Sunstar’s transition from bicycle products to oral care is a strong example.

Lesson 3: Build Transferable Capabilities

A business should not only build products. It should build capabilities.

These may include:

Manufacturing
Research
Distribution
Branding
Customer relationships
Technology

These capabilities can later be applied to new industries.

Lesson 4: Diversify Strategically

Diversification should not mean entering random industries.

The best diversification is usually connected by:

Technology
Customers
Manufacturing capabilities
Scientific expertise
Brand purpose

Sunstar’s different businesses are connected by its broader expertise in science, technology, healthcare, and materials.

Lesson 5: Invest in Research

Research can create long-term competitive advantages.

Companies that continuously invest in R&D can develop:

Better products
Proprietary technologies
Stronger expertise
New market opportunities

Lesson 6: Think Globally

A company does not have to become international overnight.

A practical approach is:

Local success → Product improvement → Regional expansion → International markets → Global organization

This gradual approach can reduce risk while creating opportunities for scale.

Lesson 7: Build Trust

Healthcare businesses especially depend on trust.

Customers want confidence that products are:

Safe
Effective
Reliable
Scientifically supported

Trust can become one of the most valuable assets a company possesses.

Here is a more detailed, polished, and practical version of Section 18, written in a case-study style suitable for a business or entrepreneurship article.

18. What Startups Can Learn From Sunstar

Sunstar’s journey provides valuable lessons for modern startups. The company did not begin with a huge product portfolio, a global customer base, or a presence in multiple industries. It started with a relatively focused business and gradually developed new capabilities, entered related markets, and expanded internationally.

For startups, the important lesson is that long-term growth does not always require starting big. A company can begin by solving one meaningful problem, build expertise around it, understand its customers, and then use its capabilities to discover new opportunities.

The following eight principles explain what modern startups can learn from Sunstar’s transformation.

Step 1 — Solve One Specific Problem

Every successful business begins with a problem worth solving.

Startups often make the mistake of trying to serve everyone from the beginning. They create multiple products, target several customer groups, and enter different markets before proving that their core idea actually works.

A better approach is to start with one specific customer problem.

Sunstar’s early business was focused on bicycle-related repair needs. Instead of beginning as a large diversified organization, it first operated around a practical market requirement.

For a modern startup, this could mean solving a problem such as:

Helping small businesses manage invoices
Making online learning easier for students
Reducing food waste for restaurants
Providing affordable healthcare solutions
Helping businesses automate repetitive tasks
Creating sustainable alternatives to everyday products

The objective is not to create the biggest product immediately. The objective is to create something that customers genuinely need.

What startups should ask:

“What specific problem are we solving, and who experiences this problem most frequently?”

A clear answer to this question creates the foundation for the entire business.

Step 2 — Build Deep Expertise

Solving a problem once is not enough. A startup needs to develop expertise that allows it to solve the problem better than competitors.

This expertise may come from:

Technical knowledge
Industry experience
Customer research
Manufacturing
Data
Research and development
Product design
Distribution
Marketing

Sunstar gradually developed knowledge and capabilities that could later be applied to new products and markets.

This demonstrates an important principle:

Build expertise, not just products.

A product can become outdated, but strong organizational knowledge can be used to create the next generation of products.

For example, a startup developing healthcare software should not focus only on building one application. It should also develop expertise in healthcare workflows, customer behavior, data management, compliance, and technology.

That knowledge becomes a long-term competitive advantage.

Step 3 — Create a Strong Product Before Expanding

Once a startup identifies a problem, the next priority should be creating a product that genuinely solves it.

Many startups expand too quickly. They launch multiple products because they believe a larger portfolio automatically creates a stronger company.

In reality, expanding before achieving product-market fit can create unnecessary costs and operational complexity.

A stronger approach is:

Problem → Product → Customer Feedback → Improvement → Product-Market Fit → Expansion

The startup should focus on:

Product quality
Reliability
User experience
Customer satisfaction
Performance
Differentiation

Sunstar’s development demonstrates the value of improving capabilities and products over time rather than relying entirely on rapid expansion.

Startup principle:

One excellent product can be more valuable than ten average products.

Once the core product has strong customer acceptance, the company has a stronger foundation for expansion.

Step 4 — Understand Customers and Continuously Improve

A business cannot grow sustainably without understanding its customers.

Customer expectations change over time. A product that works today may not be sufficient tomorrow.

Startups should therefore establish systems for collecting and analyzing customer feedback.

This can include:

Customer interviews
Surveys
Reviews
Support requests
Product analytics
User testing
Social media feedback
Sales-team feedback

However, collecting feedback is only the first step.

The important part is converting feedback into product improvements.

For example:

Customer complaint → Identify root cause → Develop solution → Test improvement → Launch → Measure results

This creates a continuous improvement cycle.

Sunstar’s long-term development illustrates the importance of adapting products and technologies to changing consumer and professional needs.

For startups, this means they should never assume:

“We built the product, so our job is finished.”

The real work begins after customers start using it.

Step 5 — Expand Into Related Markets Carefully

Once a startup becomes successful in its original market, it may discover opportunities to expand.

However, expansion should be strategic rather than random.

A company should ask:

“What new market can we enter using the capabilities we have already developed?”

This is one of the most important lessons from Sunstar.

The company’s evolution shows how capabilities developed in one area can eventually support opportunities in other markets.

A startup can similarly expand through adjacent markets.

For example:

Fitness App

→ Personal Training

→ Nutrition

→ Wearable Technology

→ Corporate Wellness

Rather than entering an unrelated market, the company expands into areas where its existing customers, technology, data, brand, or expertise provide an advantage.

Strategic expansion can provide:

New revenue streams
Larger customer markets
Better use of existing technology
Reduced dependence on one product
Opportunities for innovation

But diversification should happen only after the core business is sufficiently strong.

Step 6 — Invest in Technology and Intellectual Property

Technology can become one of the strongest competitive advantages for a startup.

Companies that continuously invest in technology can develop capabilities that competitors find difficult to reproduce.

Depending on the industry, this could involve:

Patents
Proprietary software
Algorithms
Manufacturing processes
Scientific research
Product formulations
Data systems
Specialized engineering
Technical know-how

Sunstar’s long-term emphasis on research and technology demonstrates how innovation can support competitiveness across different markets.

For startups, the objective should not simply be to use existing technology.

They should also consider:

“What technology, knowledge, or process can we develop that becomes uniquely ours?”

This creates a stronger barrier to competition.

For example, two companies may sell similar products, but the company with proprietary technology, better data, stronger research, or more efficient manufacturing may have a significant long-term advantage.

Step 7 — Expand Internationally Only After Proving the Business Model

Global expansion can be highly attractive.

A startup may see a much larger opportunity outside its home market, but international expansion also introduces complexity.

Different countries have different:

Customer preferences
Regulations
Languages
Pricing structures
Distribution systems
Competitors
Cultural expectations
Tax and legal requirements

Therefore, startups should avoid expanding internationally simply because a market appears large.

A more disciplined approach is:

Prove the business model locally

↓

Build repeatable operations

↓

Establish strong unit economics

↓

Identify suitable international markets

↓

Test one market

↓

Learn and adapt

↓

Scale internationally

Sunstar’s evolution from a Japanese business into an international organization demonstrates the value of developing capabilities over time and building a global presence strategically.

Key principle:

Do not internationalize a broken business model.

First prove that customers want the product and that the company can deliver it profitably and consistently.

Then replicate the model in appropriate markets.

Step 8 — Think Long Term

Perhaps the most important lesson from Sunstar’s history is the value of long-term thinking.

A startup may initially focus on:

Revenue
Customer acquisition
Funding
Market share
Growth

These metrics are important, but they should not be the only objectives.

A sustainable company also needs to think about:

Brand reputation
Product quality
Research
Employee development
Customer trust
Sustainability
Innovation
Operational resilience

Sunstar’s more than nine-decade history demonstrates that businesses can survive major changes when they are willing to evolve.

Markets change.

Technology changes.

Customers change.

Competitors change.

Regulations change.

A company that refuses to adapt can eventually become irrelevant.

Therefore, startups should build organizations that are designed to learn and evolve.

The Sunstar Growth Framework for Startups

Sunstar’s journey can be converted into a simple framework that modern entrepreneurs can apply:

1. Identify

Find a real and valuable customer problem.

2. Focus

Build a solution for a clearly defined market.

3. Learn

Develop deep knowledge of customers and the industry.

4. Improve

Use feedback and research to continuously improve the product.

5. Strengthen

Build technology, expertise, brand, and operational capabilities.

6. Expand

Enter adjacent markets where existing capabilities provide an advantage.

7. Internationalize

Take the proven business model into suitable global markets.

8. Adapt

Continue changing as technology, customers, and markets evolve.

This framework highlights an important distinction:

Growth is not simply about becoming bigger. Growth is about becoming more capable.

Final Takeaway for Entrepreneurs

The biggest lesson startups can take from Sunstar is that a company’s first product does not have to determine its final identity.

A business can begin with one simple problem and, over time, develop technology, expertise, customer relationships, and operational capabilities that create opportunities in completely new areas.

The key is to expand from a position of strength.

Instead of asking:

“What business should we start next?”

entrepreneurs should ask:

“What capabilities have we built, and what other problems can those capabilities help us solve?”

That shift in thinking can turn a small business into a much larger organization.

Sunstar’s story ultimately demonstrates a powerful startup principle:

Start focused, build expertise, earn customer trust, innovate continuously, expand strategically, and think beyond the next quarter.

For entrepreneurs, sustainable success is rarely created by one big decision. It is usually the result of many smart decisions made consistently over a long period of time.

19. The Biggest Takeaway From Sunstar’s Story

The most important lesson from Sunstar’s journey is not simply “diversify your business.” Diversification was certainly an important part of the company’s growth, but it was the way Sunstar diversified that makes its story particularly valuable for entrepreneurs.

The deeper lesson is:

A company can create new growth by applying its existing capabilities, knowledge, technology, and experience to new problems.

Sunstar’s transformation shows that businesses do not necessarily have to start from zero every time they enter a new market. Instead, they can identify what they already do well and find new ways to apply those strengths.

From a Simple Business to New Opportunities

Sunstar began its journey in Japan with a business connected to bicycle repair products.

At that stage, the company’s business was relatively focused. However, the organization gradually developed capabilities in areas such as:

Manufacturing
Product packaging
Materials
Distribution
Product development
Customer needs
Technology

These capabilities later became useful when the company explored opportunities outside its original market.

The important point is that Sunstar’s growth was not simply about abandoning its past and starting something completely unrelated.

Instead, the company built upon what it had already learned.

Turning Existing Capabilities Into New Businesses

This is one of the most valuable concepts entrepreneurs can learn from Sunstar.

Imagine a company has developed expertise in a particular technology.

That technology may initially be used for one product.

But the same technology might eventually be useful for:

Healthcare
Automotive
Electronics
Construction
Consumer products
Industrial applications

The company therefore has an opportunity to create new businesses without rebuilding every capability from scratch.

This can be represented as:

Existing Capability

↓

Identify a New Customer Problem

↓

Adapt Existing Knowledge

↓

Develop a New Solution

↓

Enter a New Market

↓

Build New Capabilities

↓

Create Further Growth Opportunities

This creates a cycle of continuous development.

Sunstar’s Capability-Based Growth

Sunstar’s development demonstrates several examples of capabilities becoming strategic assets.

1. Manufacturing Expertise

Manufacturing knowledge developed through one product category can potentially be transferred to other products.

As the company expanded, manufacturing became a foundation for developing a broader portfolio.

2. Packaging Knowledge

The company’s early experience with product packaging contributed to its ability to explore new consumer-product opportunities.

Packaging may appear to be a small operational detail, but innovations in packaging can sometimes open entirely new product possibilities.

3. Scientific Knowledge

As Sunstar expanded into oral healthcare, scientific and research capabilities became increasingly important.

These capabilities helped the company develop products based on healthcare and dental requirements rather than relying solely on conventional consumer-product strategies.

4. Technology

Technology became another transferable capability.

Sunstar’s businesses eventually included both healthcare-related products and industrial technologies, demonstrating how technical expertise can create opportunities across different markets.

5. Product Development

Experience in developing, testing, manufacturing, and improving products can be applied repeatedly.

Every new product can also generate additional knowledge that improves future products.

6. Customer Understanding

Perhaps the most valuable capability is understanding customers.

Customer problems differ between markets, but the ability to research those problems, identify unmet needs, and develop useful solutions is transferable.

The Difference Between Random Diversification and Strategic Diversification

Sunstar’s story also helps explain why not all diversification is equally valuable.

Random Diversification

A company sees an attractive market and enters it without having any meaningful advantage.

For example:

A software company → suddenly enters real estate

There may be no connection between its existing capabilities and the new market.

This can create significant risk.

Strategic Diversification

A company identifies a new market where its existing capabilities provide an advantage.

For example:

Technology → Healthcare Technology → Medical Data → Digital Health

Here, each step builds on capabilities developed previously.

This type of expansion is generally easier to justify because the company is not starting completely from scratch.

Sunstar’s journey provides a useful example of this broader principle.

Growth Is About Capabilities, Not Just Products

One of the biggest mistakes entrepreneurs can make is thinking only in terms of products.

A product can become outdated.

A market can disappear.

A competitor can introduce a better alternative.

But capabilities can continue creating value.

For example, suppose a company develops exceptional expertise in:

Research + Materials Science + Manufacturing

Even if its current product becomes obsolete, those capabilities can potentially be used to develop a new product.

Therefore:

Product = What you sell today

Capability = What enables you to create value tomorrow

This distinction is extremely important for long-term business strategy.

Why This Matters for Startups

The lesson is especially relevant for startups because young companies usually have limited resources.

A startup cannot afford to enter ten different markets simultaneously.

Instead, it should first build a strong capability around one problem.

For example:

Stage 1

A startup develops a software solution for small businesses.

Stage 2

It learns deeply about small-business workflows.

Stage 3

It develops expertise in automation and business data.

Stage 4

It creates additional products using the same technology.

Stage 5

It expands into related business services.

The company grows not because it randomly adds products, but because each new opportunity builds on something it has already learned.

The Sunstar Growth Flywheel

Sunstar’s broader journey can be understood as a continuous growth cycle:

Solve a Problem
↓
Build Expertise
↓
Develop Capabilities
↓
Create Better Products
↓
Earn Customer Trust
↓
Identify New Opportunities
↓
Apply Existing Capabilities to New Problems
↓
Enter Related Markets
↓
Develop New Capabilities
↓
Repeat

This creates a growth flywheel.

Every successful stage makes the company more capable of pursuing the next opportunity.

The Power of Continuous Learning

Another major takeaway is that business growth should be viewed as a learning process.

Every market teaches a company something.

Customers provide feedback.

Employees develop expertise.

Research creates new knowledge.

Manufacturing creates operational experience.

International expansion teaches the company about different markets.

Over time, these experiences accumulate.

This creates an important competitive advantage:

The longer a company learns and successfully converts that learning into capabilities, the more difficult it can become for competitors to replicate its entire organization.

Sunstar’s Story in One Simple Example

The journey can be simplified like this:

Bicycle Repair Business

→ Develop manufacturing and packaging capabilities

→ Explore a new consumer opportunity

→ Enter oral care

→ Develop healthcare and scientific expertise

→ Expand into related health and beauty areas

→ Apply technical expertise to industrial applications

→ Build an international organization

The individual businesses may appear very different.

But underneath them are transferable capabilities.

That is the strategic connection.

What Entrepreneurs Should Ask

When looking for the next growth opportunity, entrepreneurs should not immediately ask:

“What new product should we launch?”

Instead, they should ask:

About Capabilities

What are we exceptionally good at?
What technology have we developed?
What knowledge have we accumulated?
What manufacturing or operational strengths do we have?

About Customers

What other problems do our customers experience?
What needs remain unsolved?
What related products would provide additional value?

About Markets

Which adjacent markets need our capabilities?
Can our technology be applied somewhere else?
What markets have similar customer needs?

About Growth

Can we expand without losing our core strengths?
Will this new business create additional capabilities?
Can today’s investment create opportunities for tomorrow?

These questions encourage strategic growth rather than growth for its own sake.

The Final Lesson

Sunstar’s story demonstrates that successful companies do not necessarily grow by constantly abandoning the past and chasing entirely new opportunities.

Instead, they can grow by reusing, improving, and extending what they already know.

The company’s journey from bicycle-related products to oral care, health and beauty, and industrial solutions illustrates how capabilities can become the foundation for entirely new businesses.

The deepest lesson is therefore:

Don’t just build products. Build capabilities. Products may change, markets may change, and customer needs may change—but strong capabilities can help a company adapt to all three.

For entrepreneurs, this means the path to growth does not always require a completely new idea.

Sometimes, the next big opportunity is already hidden inside something your company already knows how to do well.

Conclusion

Sunstar Group’s journey from a small bicycle-related business in Japan to a diversified international organization is a powerful example of how a company can transform itself through innovation, adaptability, research, strategic diversification, and long-term thinking.

What makes Sunstar’s story particularly interesting is that its growth did not happen overnight. The company evolved gradually over decades. It began by addressing a practical market need and then used the knowledge, technology, manufacturing capabilities, and experience it developed to identify new opportunities.

The transition from bicycle-related products to oral care demonstrates how existing capabilities can be applied to completely new customer problems. Rather than limiting itself to its original market, Sunstar continued to explore where its expertise could create additional value.

Over time, this approach allowed the company to develop businesses across areas such as oral healthcare, health and beauty, and industrial solutions. Its diversification created new opportunities while reducing dependence on a single product or market.

More Than Just Diversification

One of the biggest lessons from Sunstar is that successful diversification is not about entering as many industries as possible.

Instead, it is about identifying connections between existing capabilities and new opportunities.

Sunstar’s experience shows how capabilities in areas such as:

Manufacturing
Packaging
Research
Science
Technology
Product development
Customer understanding

can become valuable foundations for future growth.

This is particularly relevant for startups. A young company does not need to launch dozens of products or enter multiple markets immediately. It can begin by solving one meaningful problem, develop deep expertise, build customer trust, and then use those capabilities to explore related opportunities.

Innovation as a Long-Term Strategy

Another important lesson is the role of continuous innovation.

Markets do not remain unchanged. Consumer expectations evolve, technology advances, competition increases, and new problems emerge.

Companies that stop improving can eventually lose their competitive position.

Sunstar’s long-term development demonstrates the importance of continuing to invest in research, product development, technology, and customer needs.

Innovation therefore should not be treated as a one-time event. It should become part of the company’s culture and operating model.

The Importance of Adaptability

Sunstar’s more than 90-year history also highlights the importance of adaptability.

A company that survives for generations cannot depend entirely on the conditions that existed when it was founded.

The markets of the future will inevitably be different from the markets of today.

Successful organizations must therefore be willing to:

Change their products
Adopt new technologies
Enter new markets
Respond to customers
Improve their operations
Develop new capabilities

At the same time, they need to preserve the strengths that give them a competitive advantage.

This balance between continuity and change is one of the most important aspects of long-term business success.

A Lesson for Modern Entrepreneurs

For entrepreneurs and startup founders, Sunstar’s story offers a practical roadmap.

A business can begin small.

It can focus on one customer problem.

It can build expertise.

It can develop a strong product.

It can earn customer trust.

It can use feedback to improve.

Then, once its capabilities become stronger, it can explore new markets and new opportunities.

The process can be summarized as:

Solve a real problem
↓
Build expertise
↓
Create value for customers
↓
Develop strong capabilities
↓
Innovate continuously
↓
Expand into related opportunities
↓
Think globally
↓
Adapt for the future

This approach is more sustainable than trying to achieve rapid growth without building a strong foundation.

The Biggest Lesson From Sunstar

Ultimately, Sunstar’s story is not simply about toothpaste, oral care, bicycles, or industrial products.

It is about the ability of a business to evolve.

A company’s first product does not necessarily determine what the company will become decades later.

What matters is whether the organization can learn, develop capabilities, recognize opportunities, and adapt those capabilities to changing customer needs.

A small business can therefore become a much larger organization when it combines vision with execution, innovation with discipline, and growth with long-term thinking.

The most powerful entrepreneurial lesson from Sunstar can be expressed in one principle:

Start with a real problem, build capabilities that create lasting value, keep learning and innovating, and never assume that your first business model has to be your final one.

Sunstar’s transformation shows that sustainable business success is rarely the result of a single brilliant idea. It is more often the result of decades of continuous improvement, strategic decisions, customer focus, and the willingness to evolve when the world changes.

For startups, small businesses, and established companies alike, that may be the most valuable lesson of all: growth is not simply about becoming bigger—it is about becoming more capable, more adaptable, and better prepared for the opportunities of the future.

Reader: 5