Ajisai Onsen Ryokan

Every bath here is private: the indoor and open-air onsen are reserved for one group at a time, about an hour in the evening and 45 minutes in the morning

The details

Area

Hakone, Kanagawa

Private bath

Reservable private bath — Every bath here is private: the indoor and open-air onsen are reserved for one group at a time, about an hour in the evening and 45 minutes in the morning

Spring water

Sulfur spring

Price guide

From ~$274 per night (checked on Klook, Nov 2026)

Access

About 85 min from Shinjuku by Romancecar limited-express train

Day-trip bathing

Overnight stay only

Steam over the valley, cedar on the wind — and Tokyo close enough that you can be in the water by lunch. 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.