Echigo-Yuzawa Onsen 越後湯沢温泉 — Niigata
Reservable private bath
Two reservable baths filled with 100% source water — Garaku no Yu is ¥2,200 for 50 minutes. The inn discloses that it combines some circulation to keep the temperature steady.
The private bath works like this: you book it, it's yours. Door closed, steam up, nobody else's schedule anywhere near you. Take the late slot — night air on wet skin is the whole point.
Private-bath and water facts were checked against the property's official site and Japanese booking pages in November 2026. Room plans change — confirm the private bath is included in the plan you book.
More in Echigo-Yuzawa Onsen
Three free reservable baths on the top floor. Thirty of the 86 rooms also have an open-air bath with natural onsen drawn in — but not every open-air-bath room is onsen (the Hanamizuki room is not, and rooms' indoor baths are not onsen), so check the room type name when booking.
Some rooms have their own open-air bath, and the hotel states that every bath in the building — rooms included — uses source water.