Is Tap Water Safe to Drink in Japan?
Tap water is potable nationwide, and luxury hotels often provide complimentary premium water. Restaurants readily serve safe iced beverages.

In top properties, ice is filtered and safe; if you prefer, ask for bottled still or sparkling. At ryokan, the welcome tea and water are trustworthy. During summer, carry hydration—your driver can stock chilled bottles.
Only in very remote mountain huts might you want bottled water; most luxury itineraries won't encounter issues.
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