Tokusui — Suntory’s New Challenge to Turn Everyday Water into Functional Wellness

“Tokusui” (literally “Special Water”) is a functional beverage launched nationwide in Japan by Suntory Foods International in October 2025. It represents the first water-based product under the successful “Tokucha” brand, known for its health benefits in the green-tea category. The concept behind Tokusui is simple yet powerful — to transform ordinary drinking water into a medium that supports body fat reduction, all while maintaining the purity, color, and taste of natural water.

Suntory developed Tokusui in response to growing consumer awareness of visceral fat and lifestyle-related health risks. In modern life dominated by deskwork and limited physical activity, many consumers seek effortless and sustainable ways to support wellness. While “Tokucha” successfully established itself as a fat-burning tea, Suntory recognized an untapped opportunity in the water category — the most universal and frequently consumed beverage — to deliver health benefits without altering daily habits. By doing so, the company aimed to evolve the concept of “drinking for health” into something even more natural and accessible.

Tokusui was officially released across Japan on October 21, 2025, following its press announcement a week earlier. Positioned as the first “functional water” in the Tokucha series, it was introduced as a new value proposition in the health-oriented beverage segment. The product features the active ingredient 3-(4-hydroxy-3-methoxyphenyl)propionic acid (HMPA), derived from fermented rice bran, which has been reported to help reduce visceral fat in individuals with higher BMI levels. Unlike flavored or sweetened waters, Tokusui is completely colorless, tasteless, and odorless, enabling effortless substitution for regular mineral water.

Tokusui was born from the “Iyemon Tokucha” line first introduced in 2013 — a pioneering unsweetened tea recognized for its fat-burning functionality. By extending the Tokucha brand into the water category, Suntory leveraged its strong reputation and scientific credibility. The packaging design retains the iconic “特 (toku)” character, a symbol of the brand’s health promise, while adopting a transparent blue tone to emphasize clarity and purity. If Tokucha stood for “health through tea,” Tokusui now represents the next evolution — “health through water.”

The introduction of Tokusui marks an important milestone in Japan’s beverage landscape — the emergence of “functional everyday hydration.” Consumers no longer need to rely on specialized drinks or supplements; simply drinking water can contribute to healthier living. Suntory has announced plans to expand the overall Tokucha brand by approximately 50% by 2028, positioning Tokusui as a key growth engine within its wellness portfolio. Future developments may include variations such as sparkling or flavored functional waters, further expanding the reach of this “everyday wellness” concept.

In essence, Tokusui bridges the gap between wellness and simplicity — embodying Suntory’s belief that true health innovation lies not in changing what people drink, but in reimagining what everyday water can do.