WATER QUALITY INDEX

Japan Water Quality Guide: Tap Water Safety & Best Bottled Brands

January 11, 2026

🇯🇵

Fuji

Japan

WQI

103

TDS

Moderately mineralised tap

November 23, 2025

Approx.

🇯🇵

Tokyo

Japan

WQI

TDS

Very soft Tokyo grid water

December 1, 2025

Approx.

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