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A smiling woman holding a bottle of ONSENSUI 99 natural alkaline water in warm daylight.
alkaline water

The habit of “hot spring water 99” to create daily beauty

``Hot Spring Water 99'' is a natural alkaline ionized water that is chosen as ``drinkable skin care''.Just by changing the water you drink every day, you can feel lighter in body and mind.

Japanese woman smiling while holding ONSENSUI99 bottle, representing premium Japanese soft water lifestyle.
beauty hydration

How much water should you drink? Daily water intake and timing explained

Explanation of hydration guidelines and daily water intake. We provide an easy-to-understand guide covering recommended intake based on body weight, hydration in Thailand, optimal timing, and the r...

Woman holding a glass of water representing hydration and healthy skin lifestyle
beauty hydration

Can Hydration Transform Your Skin? Why It's Crucial for Beauty & How to Drink Correctly | Onsen-Sui 99

How does hydration affect beauty? We'll explain in detail how it relates to your skin, the right way to drink water, and how to choose the best water.