Yakult Honsha Co., Ltd., commonly referred to as Yakult, is a Japanese company and global consumer brand best known for its small, distinctive bottles of Yakult fermented milk drink. The brand is closely associated with probiotics, intestinal health, preventive healthcare, and the scientific study of microorganisms.

Yakult originated in Japan in 1935, when physician and microbiologist Dr. Minoru Shirota developed a fermented milk drink containing the bacterial strain now known as Lacticaseibacillus paracasei strain Shirota (LcS). As of fiscal year 2026, the company states that its products are available in 40 countries and regions, with approximately 38 million bottles of dairy products consumed daily worldwide.1

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The story of Yakult begins with Minoru Shirota, who was born in Japan in 1899. While studying medicine at Kyoto Imperial University, Shirota became interested in microorganisms and the relationship between intestinal bacteria and human health.

At the time, Japan experienced significant problems involving infectious diseases and poor nutrition. Shirota became convinced that preventing illness was preferable to treating disease after it occurred. This conviction became the foundation of what Yakult later called “Shirota-ism.”2

1930 — Discovery of the Shirota strain

In 1930, Shirota successfully cultivated and strengthened a strain of lactic acid bacteria that could survive passage through the digestive system. It became known as Lacticaseibacillus paracasei strain Shirota (LcS).

The organism was previously classified as Lactobacillus casei strain Shirota; Yakult adopted the current Lacticaseibacillus paracasei classification from 2020.1

1935 — Yakult is launched

Five years after developing the bacterial strain, Shirota created a fermented milk beverage containing it. Yakult was introduced to the Japanese market in 1935, initially in Fukuoka.

The goal was not simply to create another beverage. Shirota wanted to make a product that combined his research into beneficial bacteria with his philosophy of preventive medicine and was affordable enough for ordinary people.1

1955 — Yakult Honsha is established

As Yakult’s distribution network expanded throughout Japan, Yakult Honsha Co., Ltd. was established in 1955 in Tokyo.

The company subsequently expanded beyond fermented milk products into areas including research, cosmetics, pharmaceuticals, and other food and beverage products.1

1963 — The “Yakult Lady” system

One of Yakult’s most distinctive business innovations appeared in 1963, when the company introduced its home-delivery system using sales representatives commonly known as Yakult Ladies.

Rather than relying exclusively on conventional retail stores, Yakult Ladies visited homes and communities, delivered products, and explained them directly to consumers. The system became an important part of Yakult’s distribution and brand identity.1

1964 — International expansion begins

Yakult’s first overseas operation was established in Taiwan in 1964. From there, the company expanded throughout Asia, Latin America, Europe, North America, and other markets.1

The best-known Yakult product is a fermented milk drink containing live LcS bacteria.

In the Philippines, the standard Yakult Original bottle is 80 mL and contains approximately 8 billion live LcS bacteria per bottle, according to Yakult Philippines.3

Its basic ingredients include:

• Water
• Sugar
• Skim milk powder
• Glucose
• Flavoring
• Lacticaseibacillus paracasei strain Shirota

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The beverage has a distinctive sweet, slightly tangy fermented-milk flavor and is recognizable by its small, tapered plastic bottle.

Yakult’s central scientific concept is the use of probiotics.

The term probiotic generally refers to live microorganisms that, when administered in adequate amounts, provide a health benefit to the host. Yakult’s research and product development have historically focused heavily on lactic-acid bacteria and intestinal microorganisms.1

The company’s signature organism is:

Lacticaseibacillus paracasei strain Shirota (LcS)

Yakult states that this strain is resistant to conditions such as stomach acid and bile, allowing it to reach the intestines alive. The company’s research and marketing emphasize its role in supporting intestinal health.3

It is important to distinguish this from saying that Yakult is a medicine: Yakult is primarily a food/beverage product, not a treatment for disease. The specific health effects of probiotics can vary depending on the strain, dose, person, and outcome being studied.

A major part of Yakult’s corporate identity is Shirota-ism, the philosophy inherited from its founder.

It has three major principles:

1. Preventive medicine — preventing illness rather than relying solely on treatment after illness occurs.
2. A healthy intestinal tract contributes to a long life — emphasizing the importance of intestinal health.
3. Products should be affordable — making health-oriented products accessible to as many people as possible.

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This philosophy is important because it explains why Yakult’s business model has traditionally combined scientific research, mass production, affordable products, and direct distribution.

The bottle is arguably one of the most recognizable elements of the Yakult brand.

Yakult originally used glass bottles. However, in 1968, the company changed to lightweight plastic containers. The familiar tapered design was intended to be practical: it was lightweight, unbreakable, easy to hold, and designed to make drinking the product easier.1

Over time, the bottle itself became a major part of Yakult’s visual identity.

Even without the word “Yakult” being visible, the unusual shape is often enough for consumers to recognize the product.

The name Yakult is derived from “jahurto,” an Esperanto word meaning “yogurt.”3

This gives the brand name a connection to the fermented-milk nature of the original product while also making it distinctive and internationally usable.

Although Yakult began as a Japanese product, it gradually became an international brand.

The international expansion timeline includes:

• 1964 — Taiwan
• 1968 — Brazil
• 1969 — Hong Kong
• 1971 — Thailand and South Korea
• 1978 — Philippines
• 1979 — Singapore
• 1981 — Mexico
• 1991 — Indonesia
• 1994 — Australia and the Netherlands
• 1995 — Belgium
• 1996 — United Kingdom and Germany
• 1999 — United States

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Today, Yakult’s probiotic products are available in 40 countries and regions.1

Yakult has a particularly established presence in the Philippines.

Yakult Philippines Incorporated (YPI) was incorporated on May 25, 1977, and began actual operations on October 1, 1978. It operates as the exclusive manufacturer and distributor of Yakult Cultured Milk in the Philippines through its partnership with Yakult Honsha.3

The Philippine operation manufactures Yakult locally, with its production facilities located in Calamba City, Laguna. The company also maintains a liaison office in Metro Manila.3

The standard Philippine Yakult product is an 80 mL bottle containing approximately 8 billion LcS bacteria.3

Although the little bottle is what most people associate with Yakult, Yakult Honsha is much more than a beverage company.

Its businesses include:

• Food and beverages
• Probiotic and fermented-milk products
• Pharmaceuticals
• Cosmetics
• Scientific research and life sciences

The company’s pharmaceutical business, for example, includes therapeutic medicines, with Yakult noting particular recognition in the area of anticancer drugs.1

This makes Yakult better understood as a life-science-oriented consumer company, rather than simply a manufacturer of probiotic drinks.

One interesting aspect of Yakult is that its success has not depended exclusively on the product itself.

The company developed a distinctive combination of:

Scientific research → Probiotic product → Mass production → Affordable pricing → Direct/community distribution → Consumer education

The Yakult Lady system is particularly important in this model. Yakult reports approximately 80,000 Yakult Ladies worldwide as of FY2026.1

This gives the brand a more personal relationship with consumers than a conventional supermarket-only beverage brand.

Yakult’s identity is built around several major ideas:

Health

The central promise of the brand is associated with maintaining intestinal health and incorporating probiotics into everyday life.

Science

Yakult heavily emphasizes microbiology, fermentation, bacterial research, and its long history of studying microorganisms.

Accessibility

Dr. Shirota’s philosophy emphasized making his product affordable and widely available.

Everyday consumption

Rather than positioning itself as a luxury or occasional health product, Yakult has historically promoted regular consumption as part of everyday life.

Japanese origins

The brand’s Japanese heritage remains an important component of its international identity.

Familiarity

The small bottle, red-and-white branding, and Yakult Lady distribution network have made the product highly recognizable.

Yakult’s branding is a good example of product design becoming brand identity.

Many food companies depend heavily on logos and packaging graphics. Yakult has something additional: the physical shape of the product itself is distinctive.

The combination of:

• Small 65–80 mL-class bottles depending on market/product
• Narrow neck
• Tapered body
• Red-and-white branding
• Sweet fermented-milk flavor
• Probiotic positioning
• Yakult Lady distribution
• Strong Japanese heritage

creates a highly recognizable brand system.

The bottle design introduced in the 1960s has therefore remained an important visual symbol of Yakult for generations.1

According to Yakult’s FY2026 figures, the company reports:

• 1935 — year Yakult was launched
• 40 countries and regions — current global presence
• Approximately 38 million bottles of dairy products consumed daily worldwide
• Approximately 80,000 Yakult Ladies worldwide

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These figures demonstrate that Yakult has developed from a single Japanese fermented-milk product into a genuinely global consumer brand.

Yakult summarizes its corporate philosophy as contributing to the health and happiness of people around the world through excellence in life science and research and experience involving microorganisms.2

This philosophy explains the unusual breadth of the Yakult Group. Its activities extend from everyday food products into scientific research, pharmaceuticals, and other health-related fields.

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Yakult is a Japanese probiotic brand founded around the idea that beneficial microorganisms can play an important role in human health.

Its signature product is a small fermented-milk drink containing Lacticaseibacillus paracasei strain Shirota, developed by Dr. Minoru Shirota in 1930 and commercialized as Yakult in 1935.

What makes Yakult particularly interesting as a brand is that its success comes from more than the drink itself. It combines microbiology and research, a distinctive product design, affordable mass-market positioning, Japanese heritage, an unusual direct-sales network, and decades of international expansion.

In that sense, Yakult is both a food-and-beverage brand and a life-science company, with probiotics at the center of its identity.1

1. History｜Company Profile｜Yakult
2. Philosophy & Shirota-ism | Yakult Philippines Incorporated
3. Company Profile | Yakult Philippines Incorporated