What is alkaline hot spring water? A clear explanation of its differences from regular water, its features, and how to choose it.

What is alkaline hot spring water?
"How is alkaline hot spring water different from regular water?"
"Why are health-conscious people choosing it?"
"What does pH 9.9 mean?"
Many people probably have these questions.
Alkaline hot spring water is one type of water that has been attracting attention in recent years as health and beauty consciousness grows. It's chosen by those who want to be particular about their daily hydration and those looking for easy-to-drink water.
In this article, we will clearly explain what alkaline hot spring water is, its differences from regular water and natural water, and tips on how to choose it.
Alkaline hot spring water is water that exhibits alkalinity.
Water has a property called "pH."
pH is an indicator of how close water is to being acidic, neutral, or alkaline.
Generally, water with a pH higher than 7 is considered alkaline.
Among these, those manufactured and sold for drinking purposes are sometimes called alkaline hot spring water.
What's the difference from regular water?
There are various types of water commonly consumed daily.
- Tap water
- Mineral water
- Natural water
- RO water (filtered water)
- Alkaline hot spring water
Alkaline hot spring water is sometimes chosen because it is characterized by its pH value and mouthfeel.
For example,
- it feels mellow
- it feels easy to drink
- it's easy to incorporate into daily hydration
are some of the comments.
*Individual perceptions may vary.
There is also natural alkaline hot spring water.
When people hear "alkaline hot spring water," they often imagine water generated by machines, but there is also natural water that is alkaline by nature.
Natural waters exist that exhibit alkalinity due to the influence of natural environments like geological strata and volcanic belts, which form their mineral balance.
Therefore, alkaline hot spring water is not always artificial.
Drinkability also changes with hardness.
"Hardness" is also an important factor when considering the deliciousness of water.
- Hard water: Rich in minerals, with a robust taste.
- Soft water: Smooth and easy-to-drink mouthfeel.
Many people in Japan prefer soft water, and many choose it for daily consumption.
ONSENSUI99 is an ultra-soft water with a hardness of 1.7, characterized by its mellow taste.
The era of choosing water for daily hydration.
Just like diet, exercise, and sleep, hydration is also a daily habit.
Therefore, recently,
- Drinkability
- Sustainability
- Origin and quality
- Mineral balance
- Compatibility with lifestyle
More and more people are choosing water with these factors in mind.
It's important not just to quench your thirst, but to choose water you can continue drinking every day.

ONSENSUI99: An Option
ONSENSUI99, sourced from Tarumizu Onsen in Kagoshima Prefecture, Japan, is a natural water with naturally occurring alkalinity.
Features:
- pH 9.9 (natural origin)
- Ultra-soft water with 1.7 hardness
- Quality control through heat sterilization
- Mellow and easy-to-drink taste
It is chosen not only for daily hydration but also for coffee, tea, and cooking rice.
*Values are examples of product characteristics.
How to choose alkaline hot spring water
When choosing alkaline hot spring water, the following points are recommended:
1. Drinkability
When drinking daily, the mouthfeel is important.
2. Origin/Quality Control
Check if the brand is trustworthy.
3. Hardness
If you prefer a soft taste, soft water is recommended.
4. Size suitable for your lifestyle
Choosing sizes like 500ml or 2L according to your needs makes it easier to continue.
Summary: Water choice can change your everyday life.
Alkaline hot spring water is a type of alkaline water, often chosen for its drinkability, mouthfeel, and focus on quality.
Because it's something you drink every day, it's important to choose water that suits you.
If you are looking for naturally alkaline natural water, please check out ONSENSUI99.

