Onsen OniOnsen Oni

Yamanakako Hirano Onsen ISHIWARI-NO-YU

山中湖平野温泉 石割の湯やまなかこひらのおんせん いしわりのゆ

Other
Yamanakako Onsen
Chubu·Yamanashi
0555-20-3355ishiwarinoyu.jp

Day Use

Yes
11:00–19:00
¥900

大人900円（入湯税150円含む）、中高生700円（入湯税100円含む）、小学生350円、小学生未満無料

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Dry heat sauna room

OnsenYes

Uses natural hot spring water

Capabilities

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

TattooNo

Allows entry with visible tattoos

KidsYes

Welcomes children and families

DiningNo

Restaurant or dining open to visitors (not just hotel meal plans)

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

Rest AreaYes

Relaxation space for after bathing

ParkingYes

On-site or nearby parking available

山中湖平野温泉

Yamanakako Hirano Onsen

Operated by · 山中湖村

Sampled at wellhead
湯
Simple
Classification

Sodium spring

A simple thermal spring at Hirano on the shore of Lake Yamanaka, pumped to the surface and sitting on the alkaline side at roughly pH 9, which gives it the slippery feel of Japan's beauty-water family. Lightly mineralized at 176 mg/kg, it is colorless, clear, tasteless, and odorless — gentle and unassuming on the skin. The source emerges at 29.2 °C, a cold-mineral-range temperature, so it is reheated for bathing.

Source temperature
29.2°C
Low temp.
Tonicity
0.18g/kg
Hypotonic
Flow rate
61.3L/min
Typical
Color
colorless and clear
Taste
tasteless
Odor
odorless

Analyzed Oct 16, 2015·山梨県環境科学検査センター·Cert no. 山梨温泉第27-18号

About

Ishiwari no Yu (石割の湯) sits at the foot of Ishiwari-yama (石割山) near Lake Yamanaka. The building itself is worth noting: a timber dome built from locally grown chestnut and hinoki cypress, with traditional exposed-beam construction that earned an award from the Yamanashi prefectural forestry agency. Inside, there are large indoor baths, a reclining bath (neyu, 寝湯), and a cool source bath (gensen nuruyyu, 源泉ぬる湯). Two open-air baths sit outside: one carved from rock, the other lined in hinoki cypress. The water comes out naturally smooth and slightly slippery on the skin. Dry sauna is available in both sections.

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SM
Sergey M
1 year ago

165. Yamanakako Hirano Onsen ISHIWARI-NO-YU, Yamanashi Onsen on the east side of Yamanakako, not very convenient to get to/from. Inside there's a cafe for snacking, a rest area, a merch shop, and vegetables. They stamp the Yamanashi 100 Onsen book. Inside there's a large bath with three jets, plus a separate lying area for three. Clear water, hot temperature. Breathing inside is comfortable. There's a sauna and a cold bath. Outside there are two baths in different spots. One is a small stone bath, clear water, temperature between warm and hot. The second outdoor bath is larger, rectangular. The water there was more like just warm, also clear. Nice homey place, but getting there by public transport is a pain.