Tonosawa Ichinoyu Honkan: the room with its own onsen
塔ノ沢一の湯 本館
by Hakone-Yumoto station. Google rating 4.3 from 807 reviews. Checked on its own website on 15 November 2026.
- Indoor bath
- Free-flowing spring
The room to book
Large Japanese room with kakenagashi indoor onsen bath
The proof, in Tonosawa Ichinoyu Honkan's own words
温泉付き客室・1泊2食付きが10%OFFプランを販売中★
源泉掛け流しの内風呂付き、シャワー併設
夕朝食は4階のレストランでお召し上がりいただきます。
| Room to book | Large Japanese room with kakenagashi indoor onsen bath大型和室（内風呂付） |
|---|---|
| Hot-spring water in the room | Yes, quoted below |
| Bath | Indoor bath |
| Free-flowing spring (kakenagashi) | Yes |
| Spring type | Alkaline simple spring |
| View from the bath | Not stated |
| Dinner | Dinner in the restaurant |
| Beds | Futon on tatami |
| Rooms with the bath | Some rooms only: book by name |
| Room size | Not stated |
| Sleeps | Up to 7 |
Some rooms have no bath or toilet. The water of the open-air bath rooms is not stated.
Getting this room
- Book it by name. Choose "Large Japanese room with kakenagashi indoor onsen bath" (大型和室（内風呂付）). Only some rooms have the bath.
- Ask what the website doesn't say. It doesn't mention the view.
- Check the confirmation. It should name the room with the bath. If it doesn't, contact the property.
Nearest other rooms with their own onsen
- Shiunso0.0 km · Special room with open-air onsen bath
- Yama no Chaya0.2 km · Room with open-air onsen bath
- Hidamari Ichinoyu0.2 km · Room with open-air onsen bath