ONSENSUI99
A Water Shaped by Time

ONSENSUI99 is a premium Japanese natural alkaline water sourced from deep underground beneath the Sakurajima volcano in Tarumizu City, Kagoshima, Japan. This unique region is known for its active volcanic activity and rich geological environment, which plays a key role in shaping the exceptional quality of the water.

Natural Alkaline Water from Sakurajima Volcano

Over thousands of years, rainwater slowly penetrates volcanic layers and natural rock formations, undergoing a long process of natural filtration. Through this geological journey, the water absorbs carefully balanced minerals while maintaining an extremely low hardness. The result is an ultra-soft natural alkaline water with a remarkably smooth texture and clean taste.

One of the most distinctive features of ONSENSUI99 is its naturally high alkalinity. With a pH level of 9.5 to 9.9, ONSENSUI99 supports daily hydration with water that aligns with the body’s natural balance. Unlike artificially processed alkaline water, ONSENSUI99 achieves its alkalinity purely through natural geological processes, without any chemical treatment or additives.

Another defining characteristic is its ultra-soft hardness of only 1.7. This extremely low mineral hardness makes ONSENSUI99 one of the softest bottled waters available globally. The gentle texture allows for effortless drinking and a refined mouthfeel, making it suitable for people of all ages, including children and seniors. The softness also enhances flavor clarity, allowing the natural taste of food and beverages to stand out.

ONSENSUI99 is carefully bottled in Japan under strict quality control standards. The water is handled with respect for its natural properties, ensuring that the original purity, mineral balance, and taste are preserved from source to bottle. This commitment to quality reflects Japanese craftsmanship and attention to detail, delivering a product trusted by both consumers and professionals.

Thanks to its purity and ultra-soft profile, ONSENSUI99 is not only ideal for everyday drinking, but also widely used in professional fields. In hospitality, it is chosen by hotels and restaurants that value premium water experiences. In wellness and beauty, it is favored for its gentle nature and compatibility with skincare and health routines. In culinary applications, it is used by chefs and tea specialists who seek water that enhances flavors without interference.

ONSENSUI99 is available in multiple formats to suit different lifestyles and professional needs, including 500ml bottles for personal use, 2L bottles for family and daily consumption, and 11.5L bag-in-box (BIB) for commercial and professional environments. This flexible lineup allows ONSENSUI99 to serve a wide range of markets, from premium retail to hospitality and wellness industries.

More than just bottled water, ONSENSUI99 represents a philosophy of water shaped by time and earth. It embodies the harmony between nature and human life, offering a rare natural resource refined through geological time. From the volcanic land of Kagoshima to the hands of people around the world, ONSENSUI99 delivers a truly unique Japanese natural alkaline water experience.