Noboribetsu Onsen 登別温泉 — Hokkaido
In-room bath + reservable private bath
Premium rooms have their own open-air or observation onsen bath, and premium-plan guests can also reserve a private onsen-and-sauna bath (¥3,300 per adult for 90 minutes).
You get both kinds of private here — a bath of your own, and reservable ones for the long soak. Most guests use both before checkout. You probably will too.
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 Noboribetsu Onsen
Three special rooms have their own indoor bath filled with natural onsen — the first rooms of their kind in the district, the hotel says. The other rooms use the large baths.
The DW and D room types (12 rooms in total) have their own open-air bath pouring free-flowing source water. The other room types' indoor baths are not onsen baths.