What is Onsensui 99? | Reasons why ONSENSUI99 is chosen and the characteristics of ultra-soft water

What is Onsensui99 (ONSENSUI99 / ONSENSUI 99)?

Onsensui99 (ONSENSUI99 / ONSENSUI 99) is natural alkaline hot spring water sourced from Tarumizu City, Kagoshima Prefecture.

It is natural water sourced from deep underground, characterized by its naturally occurring alkalinity and ultra-softness with a hardness of 1.7.

Known as "drinkable hot spring water," it has garnered attention not only in Japan but also overseas.

Currently, it is expanding into international markets, including Thailand, in addition to Japan.

Why is ONSENSUI99 (ONSENSUI 99) said to be "easy to drink"?

Many people describe Onsensui99 as:

• "Mellow"
• "Soft water"
• "Mild taste"
• "Easy to drink"

One of the reasons for this is its ultra-softness with a hardness of 1.7.

In Japan, a soft water culture has developed since ancient times.

Therefore, the Japanese palate is said to be relatively accustomed to soft water.

On the other hand, in some regions abroad, hard water is common, and some people may experience:

• Mineral taste
• Bitterness
• Heaviness

ONSENSUI99 (ONSENSUI 99) is an ultra-soft natural water with very low hardness, making it easy to enjoy its soft texture.

What is ultra-soft water? | The difference between soft water and hard water

Water is generally classified into:

• Soft water
• Hard water

This is due to the difference in the amount of calcium and magnesium (hardness) contained in the water.

ONSENSUI99 (ONSENSUI 99) is ultra-soft water with a hardness of 1.7.

It has a very low hardness compared to general mineral waters.

Differences between ONSENSUI99 (ONSENSUI 99) and general mineral water

Item	ONSENSUI99 (ONSENSUI 99)	General Mineral Water
Hardness	1.7	Approx. 30-120
Characteristics	Ultra-soft water	Soft to hard water
Texture	Soft	Varies by product
Taste	Mellow	May have a strong mineral taste
Compatibility with Japanese cuisine	Good	Varies by product

Therefore, many people find it:

• Less bitter
• Soft in taste
• Easy to drink daily

Why is it compatible with Japanese food, coffee, and matcha?

In Japan, a soft water culture has developed since ancient times.

Therefore, many aspects of Japanese food culture, such as:

• Dashi (broth)
• Green tea
• Matcha
• Rice cooking

are said to be highly compatible with soft water.

Due to its soft texture, characteristic of ultra-soft water, ONSENSUI99 (ONSENSUI 99) is chosen by those who want to:

• Reduce the bitterness of coffee
• Enjoy mellow matcha
• Bring out the umami of dashi

Many people are surprised, saying, "Can water really change the taste this much?"

Does water change the taste of coffee or tea?

It is said that the taste of coffee and tea actually changes depending on the "water" used.

In particular, the perception of:

• Bitterness
• Astringency
• Aroma
• Aftertaste

can vary depending on the water's:

• Hardness
• Mineral balance
• Mouthfeel

Therefore, an increasing number of people who enjoy coffee and matcha are becoming particular about their water.

Natural water nurtured by the nature of Tarumizu, Kagoshima

ONSENSUI99 (ONSENSUI 99) is sourced from Tarumizu City, Kagoshima Prefecture.

This is a naturally rich area overlooking Sakurajima, known as a hot spring resort since ancient times.

The groundwater, naturally filtered over many years, has a mellow and soft taste.

Furthermore, Onsensui99 prioritizes the natural environment and safety.

Utilizing its naturally derived properties while being managed with Japanese quality is one of the reasons why many people choose it.

*This is due to naturally derived properties.

What is the difference between water overseas and water in Japan?

In some countries overseas, hard water is common depending on the region.

Therefore, when Japanese people start living abroad, they may feel that:

• "The taste of the water is different."
• "It's hard to drink."
• "The taste of coffee is different."

Especially during life in Thailand, many Japanese people are careful about water.

ONSENSUI99 (ONSENSUI 99) is supported by Japanese people living abroad as ultra-soft water of Japanese quality.

Japanese-quality water to the world

ONSENSUI99 (ONSENSUI 99) is not just mineral water; it is expanding overseas with the desire to:

"Deliver Japan's water culture to the world."

We want to deliver the following, which are taken for granted in Japan, to other countries:

• Soft water culture
• Delicate palate
• Compatibility with Japanese cuisine

With this in mind, we continue to challenge ourselves in overseas markets, starting with Thailand.

Are ONSENSUI99 and ONSENSUI 99 the same?

Yes, both "ONSENSUI99" and "ONSENSUI 99" refer to Onsensui99.

Overseas, it may sometimes be written as "ONSENSUI 99" with a space.

ONSENSUI99 (ONSENSUI 99) is chosen by people who are:

• Looking for easy-to-drink water
• Prefer ultra-soft water
• Want to enjoy coffee or matcha
• Value compatibility with Japanese cuisine
• Japanese living in Thailand
• Interested in beauty and wellness

Because water is consumed daily, people want to be particular about it.

It is supported by such individuals.

Related Articles

▶ What is Ultra-Soft Water? | Its Relationship with Japanese Water Culture
▶ Does Coffee Change with Water? | On its Compatibility with Ultra-Soft Water
▶ The Relationship Between Matcha and Water | Why Water Changes the Taste
▶ Life in Thailand and Water Conditions | What Surprises Japanese People
▶ What is Tarumizu, Kagoshima? | A Town Where Nature and Hot Spring Culture Thrive
▶ The Relationship Between Japanese Dashi Culture and Soft Water

Frequently Asked Questions (FAQ)

Is Onsensui99 hot spring water?

It is natural water sourced from Tarumizu City, Kagoshima Prefecture, known as a hot spring area.

Why is it alkaline?

It has a naturally derived pH of 9.5 to 9.9, making it alkaline.

*This is due to naturally derived properties.

Is Onsensui99 hard water or soft water?

It is ultra-soft water with a hardness of 1.7.

Why is it said to be "easy to drink"?

It is characterized by its soft texture, due to being ultra-soft water.

What is the difference from regular mineral water?

It is characterized by its mellow taste, unique to ultra-soft water.

Are ONSENSUI99 and ONSENSUI 99 the same?

Yes, both refer to Onsensui99.

Can I buy it overseas?

It is sold and available in some overseas regions, including Thailand.

Summary | ONSENSUI99 (ONSENSUI 99) is natural water that delivers Japan's ultra-soft water culture to the world

Onsensui99 (ONSENSUI99 / ONSENSUI 99) is natural water born in Japan, characterized by:

• Natural water from Tarumizu City, Kagoshima Prefecture
• Natural alkaline hot spring water with a pH of 9.9
• Ultra-soft water with a hardness of 1.7
• Compatibility with Japanese food culture
• The reassurance of Japanese quality

"Because I drink water every day, I want to be particular about how easy it is to drink."

ONSENSUI99 (ONSENSUI 99) is chosen by such people.