162. Fuji-sensui, Yamanashi An onsen. Entry 800 yen and 300 for a towel set. Only found info boards like the ones in the photo. Not included in the Yamanashi stamp rally. 1. Indoor area: 1.0. Breathing inside is comfortable. You can catch a glimpse of Mt. Fuji from the edge of the indoor bath. 1.1. First bath. Water is clear, temperature between warm and hot. Slight chlorine smell. 1.2. Second bath. Basically the same as the first but the water temperature is slightly higher. 1.3. Sauna. 1.4. Cold bath. 2. Outdoor area: 2.0. Can't see Mt. Fuji from the bath itself, but visible when standing, especially from the resting area. The view isn't that interesting though - a lot is hidden by the fence and tree foliage in summer. 2.1. Stone bath. Water is clear, temperature between warm and hot. Probably optimal for summer actually. 2.2. Wooden tub for two people. 2.3. Chairs for sitting and sunbathing. I have mixed feelings - the Mt. Fuji view comes with caveats and there were a lot of people on Sunday - locals, not tourists.
Fuji-sensui
富士山溶岩の湯 泉水ふじさんようがんのゆ せんすい
Lava-themed day bath with Mt. Fuji views from the open-air tubs
Day Use
YesOccasional closures for facility maintenance.
Adults (middle school+) ¥900 / Children (4–elementary) ¥600 / Toddlers (3 and under) ¥500. Morning bath 6:00–9:00: Adults ¥650, Children ¥350. Last entry 22:30 (morning last entry 8:30).
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Bathing Arrangements
A private bath you can reserve for yourself or your group
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Towels to rent or borrow at the desk
Relaxation space for after bathing
On-site or nearby parking available
Views
MountainsHighlights
Jet BathAbout
The baths here lean into a lava theme, with the indoor tubs and two open-air pools all styled around the volcanic landscape. On a clear day the rotenburo (open-air baths) look straight toward Mt. Fuji. The facility also claims Japan's first microbubble open-air bath. A sauna and cold bath round things out. The whole place has a compact, Showa-era feel, and the early morning session is popular with people coming off a night climb up the mountain.
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Last updated September 19, 2026