Nagano · Asama Onsen, Matsumoto
Hot Plaza Asama
ホットプラザ浅間
A day-bathing facility at the heart of Asama Onsen in Matsumoto, Nagano, in a hot-spring area that has been flowing for over 1,300 years. Its weakly alkaline simple spring (colorless and clear) fills an open-air bath and a large indoor bath, and it stays open until midnight.
- Price (adult)
- ¥750
- Hours
- 10:00-24:00 (last entry 23:00)
- Closed
- Tuesdays
- Access
- 3-16-3 Asama Onsen, Matsumoto, Nagano. About 25 minutes by Matsumoto Dentetsu bus from JR Matsumoto Station (via Shinshu University to Asama Onsen), get off at Hot Plaza Asama-mae, 1 minute on foot; or about 25 minutes by car from Matsumoto IC. Three free parking lots.
- Water type
- Alkaline simple
- Tattoos
- Ask ahead
- Phone
- 0263-46-6278
- Official site
- hotplaza.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
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Why go
- A weakly alkaline simple spring (colorless and clear), with an open-air bath and a large indoor bath
- Adults 750 yen, children 400 yen; open 10:00-24:00 (last entry 23:00)
- About 25 minutes by bus from Matsumoto Station and 25 minutes by car from Matsumoto IC, handy for Matsumoto Castle and Kamikochi
About this onsen
Asama Onsen is a historic hot-spring area that has been flowing for over 1,300 years. Hot Plaza Asama is a day-bathing facility whose weakly alkaline simple spring (colorless and clear) fills an open-air bath and a large bath; with midnight closing it is easy to drop in after sightseeing.
Good to know
Admission is 750 yen for adults and 400 yen for children, and it is closed on Tuesdays. It is about 10 minutes from Matsumoto Castle by bus or car, a handy base for the castle town and the Northern Alps.
Before you go
- No official tattoo policy is published — ask at reception.
- Payment is usually by ticket machine in cash — bring coins.
- Last entry is 30–60 minutes before closing.
Features
Convenience
Amenities
✔ Verified operating: 2026-10 Operating status and rates cross-checked against the official site and onsen guides (full source notes in Japanese on the JA page)
Prices and hours change. Check official sources before visiting.
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