Yamanakako Onsen; Ishiwari no Yu
Yamanakako, Yamanashi, Japan
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- Location
- Yamanakako, Yamanashi, Japan
- Temperature
- 40 °C
- pH
- 6.5
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Yamanakako Onsen Ishiwari no Yu, by Lake Yamanaka in Yamanashi Prefecture, draws sulfurous thermal water at 40°C. The bathhouse includes an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Lake Yamanakako, highest of the Fuji Five Lakes at 981m, offers the most dramatic Fuji panoramas — Mt. Fuji rises over 3,700 meters above the lake's surface in clear conditions, one of the greatest vertical reliefs visible from any Japanese onsen. 'Ishiwari no Yu' (Rock-splitting Spring) references the volcanic force beneath the lava fields of the Fuji volcanic system. The legendary 'Diamond Fuji' — when the sun exactly aligns with Fuji's summit — can be witnessed from this lakeside in late October and mid-February at sunset.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.