journal

🧪 Annex Science Series Vol.3｜Science of high temperature sterilization and safety｜Delivering “drinkable hot springs” with peace of mind

Hot Spring Water 99 is a natural water with an alkaline pH of 9.9 and a hardness of 1.7.We perform high-temperature sterilization to increase safety while preserving its natural power.We will intro...

🧪 Annex Science Series Vol.2｜What is super soft water? The science of “softness” created by a hardness of 1.7

The hardness of Hot Spring Water 99 is 1.7 mg/L (calculated as CaCO₃). This is "super soft" water, which is extremely rare even by WHO standards. We will decipher the true nature of easy drinking f...

🧪 Annex Science Series Vol.1｜What is alkaline ionized water? Using science to solve the problem of “friendly water” with a pH of 9.9

"Hot Spring Water 99" is a natural alkaline ionized water with a pH of 9.9. We will explain the differences in alkalinity, hardness, and geology in an easy-to-understand manner from a scientific pe...

Onsen Water 99 Wellness Series｜Incorporate “drinking hot springs” into your beauty, health, and daily life

“Drinkable hot springs” that are closely related to beauty, health, and daily lifestyle. "Onsen Water 99 Wellness Series" proposes a beautiful and healthy daily life through hot spring water 99.

🧪 Onsen Water 99 Annex Science Series | Story of water science and quality

An explanation of the natural alkalinity of hot spring water, pH 9.9, from geological and chemical perspectives.Introducing the alkaline mechanism produced by the strata of Tarumi Onsen in Kagoshim...

How to use “drinking hot springs” that you can do at home | 99 ways to use hot spring water in your daily life

Hot Spring Water 99 is a “drinkable hot spring” that can be used not only for drinking, but also for cooking, coffee, and rice cooking. We will show you how to easily enjoy the natural alkaline ion...

What is Hot Spring Water 99? A story of “drinking hot springs” from Tarumi Onsen in Kagoshima

What kind of water is Onsen-sui 99? We explain its characteristics of pH 9.9 and hardness of 1.7, its drinkability, and why it is chosen.

“Gentle water” that makes your body happy in “Thailand, the land of spicy food” — Reset your daily life with alkaline ionized water

Thailand's food culture is spicy, but at the same time, it makes you sweat easily and puts a heavy burden on your body.Natural alkaline ionized water with a pH of 9.9, ``Onsen Water 99'', gently ad...

☀️ Thailand's heat and hydration — Why alkaline ionized water is good for your body

Thailand is hot all year round, making it easy for people to become dehydrated and lose their internal balance.Natural alkaline ionized water with a pH of 9.9 ``Onsen Water 99'' is easy to drink an...

☀️ “Drinking hot springs” to protect your beauty and health while traveling｜For preventing dryness and fatigue

The cause of rough skin and fatigue while traveling is ``disturbance of water balance.'' Natural alkaline ionized water "Onsen Water 99" with pH 9.9 and hardness 1.7 scientifically treats dryness, ...