ONSEN WATER 99

Born from Volcano. Filtered by the Earth. Shaped by Time.

Ultra-soft alkaline water from Kagoshima, Japan
pH 9.5–9.9 / Hardness 1.7

Premium Japanese Alkaline Water from Japan

ONSENSUI99 is a premium Japanese alkaline water sourced from Tarumizu hot spring
in Kagoshima, Japan. Naturally filtered through volcanic rock over thousands of years,
this natural alkaline water features ultra-soft hardness of 1.7 and a gentle pH of 9.5–9.9,
making it ideal for daily hydration, wellness, and refined lifestyles.

Natural Alkaline Water from Japan – ONSENSUI99

ONSENSUI99 is a premium Japanese natural alkaline water brand sourced from
Tarumizu hot spring in Kagoshima, Japan.
We provide high-quality alkaline water for global distribution,
serving hotels, wellness brands, and premium partners worldwide.

For global distribution and partnership inquiries, please contact us.

Business Inquiry

What is ONSEN WATER 99

ONSEN WATER 99 is a natural alkaline water born in Kagoshima, Japan —
a region shaped by volcanic activity over thousands of years.

Rainwater slowly travels deep underground, filtered naturally through multiple layers of volcanic rock.
Over time, this process softens the water, refines its mineral balance, and gently increases its alkalinity —
without artificial processing.

The result is water defined by nature, and proven by science.

Volcanic eruption in Kagoshima, the origin of ONSEN WATER 99
Volcanic geological layers formed over time in Kagoshima, naturally filtering water through the earth
ONSENSUI 99 500ml bottles chilled in ice water, evoking the freshness of Japanese nature

The Water Profile of ONSEN WATER 99

A scientifically rare balance, shaped by volcanic geology and time.

pH 9.5–9.9

Natural Alkalinity

Hardness 1.7

Ultra-Soft Water

Resulting Quality

A natural water character shaped by volcanic geology and time.

  • Ultra-soft mouthfeel

  • Smooth and gentle on the palate

  • Naturally balanced alkaline water

  • Easy to drink, even in large amounts

For Everyday Living

• Daily hydration
• Coffee and tea
• Cooking and food preparation
• Family-friendly daily water

For Professional Use

• Cafés and restaurants
• Hotels and hospitality
• Wellness and spa facilities
• Offices and professional environments

Business & Partnership

ONSEN WATER 99 is developed for long-term global partnerships.

We work with distributors, importers, and businesses
who value quality, transparency, and sustainability.

Contact for Business