Our Water
Where Does MTN WTR Come From?
MTN WTR is sourced from Mt. Fuji, nestled in the nature-rich village of Narusawa in Yamanashi Prefecture, Japan. It begins as rain and snow and spends decades moving slowly through volcanic rock, naturally filtered along the way. The result is a clean, balanced mineral profile—no additives—bottled in Japan at the source for a crisp, smooth sip.
MTN WTR begins as rain and snow that fall high on Mt. Fuji (1,400–2,700m), in the protected forests of Fuji-Hakone-Izu National Park. It starts clean and untouched—pure from the source.
Where the journey begins
Rain and snowmelt on Mt. Fuji seep into porous volcanic basalt and travel slowly underground for decades, naturally filtered through layers of volcanic rock.
From Mountain to Spring
Bottled at the Source
After nearly 50 years underground, the water collects in a natural spring aquifer and rises in Narusawa, Yamanashi as true spring water. We bottle it at the source to help protect freshness from bottling to opening.
Want to learn more? Visit our FAQ or watch the video.
Want to learn more? Visit our FAQ or watch the video.
→Watch the video
Competitor Analysis
Have you tried our water? It’s additive-free and naturally balanced at a pH of 8.6! With a low Total Dissolved Solids (TDS) count, MTN WTR offers a clean, crisp taste that reflects its pure origins.
FAQs
Product & Quality
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MTN WTR is unique because authentic Japanese spring water is rarely available in the U.S. Japanese spring water is known for a lighter mineral profile (low TDS), which gives MTN WTR its clean, crisp finish. That’s why it pairs so well with quality spirits and delicate dishes—it refreshes without getting in the way.
Sourced from Mt. Fuji’s protected underground aquifers and naturally filtered through volcanic rock for about 50 years, MTN WTR is naturally alkaline at 8.6+ pH with low TDS—no artificial adjustment. And for sparkle lovers, we bring Japan’s 強炭酸 (Kyōtansan / strong carbonation) culture to the U.S. with EXTRA STRONG, featuring 4.0–4.5 volumes of CO₂ for a bold, high-energy fizz.
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MTN WTR has a naturally alkaline pH of 8.6+. Mt. Fuji’s basaltic volcanic rock is low in acidity and rich in alkaline minerals. As rain and snow melt and move slowly underground, the water filters through these volcanic layers over decades. Over time, it absorbs those minerals, resulting in a balanced alkaline profile without artificial adjustment
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TDS stands for Total Dissolved Solids. It’s a measure of the minerals dissolved in water—especially calcium and magnesium. Those minerals shape how water tastes and feels. When TDS is high, water can drink “heavier,” with a more mineral-forward finish.
MTN WTR is low TDS because Mt. Fuji’s basaltic volcanic rock is naturally lower in calcium and magnesium. The result is a clean, smooth sip that stays light on the palate. What makes Mt. Fuji water especially distinctive is that it can stay low TDS while also being naturally alkaline (8.6+ pH)—a balance created by the mountain’s geology.
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MTN WTR is 100% naturally alkaline. Our 8.6+ pH comes from the water’s long journey through Mt. Fuji’s basaltic volcanic rock over about 50 years. We don’t add anything to change it—no chemicals, no processing, no adjustments.
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Approximately 50 years. Rain and snow that fall on Mt. Fuji slowly seep into the mountain’s porous basaltic volcanic rock, then filter through underground volcanic layers over time before emerging at our source in Narusawa. This long journey is what gives MTN WTR its clean clarity and balanced taste.
