Jozankei Onsen 定山渓温泉 — Hokkaido
Private open-air bath in your room
A small club-style annex where every room's tub has its own source valve — turn it and unheated, undiluted spring water runs in, straight from the group's three riverbed sources.
And the bath? It's in your room. Not down a corridor, not on a sign-up sheet. Run it before dinner. Run it again at midnight. Wake up and get straight back in — nobody's timetable touches you here.
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 Jozankei Onsen
Forest cottages and terrace rooms with their own open-air baths, filled straight from the source — a big Tsuruga resort an hour from central Sapporo.
Every room has its own hinoki onsen bath, and four reservable open-air baths are free to use as often as you like — a Kyoritsu resort in the Jozankei valley.
Most rooms look over the valley through a wall of glass with an onsen view bath beside it — the hotel dug for three years to find its own source.