Asama Onsen, Matsumoto, Nagano Prefecture
Yuyu-an Biwa-no-Yu
The strongest pick for historic architecture, garden atmosphere and outdoor bathing. If you need a firm price, late hours, a direct bus or confirmed tattoo rules, Hot Plaza Asama is more straightforward.
Check before bathing
- Opening hours
- 09:00–21:00; last admission 20:00. Normally closed on Wednesdays, or the following day when Wednesday is a public holiday.
Spring & water temperature
- Spring-source temperature
- Not published.
- Bathing temperature
- Not published.
- Spring source
- Asama Onsen; the current main official pages do not identify a facility-specific well that can be safely matched to this bath.
- Spring classification
- Weakly alkaline/simple hot spring, according to Matsumoto City's current description.
- pH
- Not published.
- Flow rate
- Not published.
- Water handling
- Current main official visitor pages do not specify water addition, heating, circulation, disinfection or source-flow conditions pool by pool. Older local material and 2026 visitor samples mention circulation, but they are not treated as a current facility specification.
Bathing indications
Matsumoto City provides general spring characteristics. No medical or beauty effect is claimed here.
Matsumoto City's current adult rate is ¥900 and the child rate is ¥500, while some local Asama Onsen pages still list ¥800 for adults. Confirm the price by phone on the day. Last admission is 20:00.
How to read a bath profile
Spring-source temperature and actual bathing temperature are kept separate. Each score is shown independently for comparison rather than collapsed into one overall score.
