By Bessho-Onsen Station, Bessho Onsen, Ueda, Nagano Prefecture
Aisome-no-Yu, Aisomekaku
The easiest of the Bessho options for families, older visitors, rainy or snowy days, luggage, and anyone who wants an outdoor bath and places to rest. Choose Daishi-yu for the traditional public-bath feel and fully source-flowing water.
Check before bathing
- Opening hours
- 10:00–22:00; last admission 21:20. Normally closed on the second and fourth Wednesdays of each month; if a closure falls on a public holiday, it moves to the following day.
- Access
- In front of Bessho-Onsen Station.
Spring & water temperature
- Spring-source temperature
- 50.9°C, according to the Ueda City facility page.
- Bathing temperature
- Not published.
- Spring source
- Bessho Onsen No. 4 spring system, according to the property district's distribution map.
- Spring classification
- Simple sulfur hot spring (low-tonicity, alkaline, high-temperature spring).
- pH
- Not published on the current main facility page; the 2014 No. 4 analysis is not substituted for the bath's pH.
- Flow rate
- Facility-specific flow is not published. The property district confirms that No. 4 supplies Aisome-no-yu.
- Water handling
- Ueda City says circulation filtration is used to protect the spring resource and maintain hygiene. No bathing additives are used; ultraviolet treatment and circulation filtration are used, pool water is changed and the pools cleaned daily, and supply pipes are disinfected with chlorine-based chemicals.
Bathing indications
Ueda City lists general bathing indications including neuralgia, muscle pain and frozen shoulder. This is not a treatment guarantee.
Circulation filtration and ultraviolet treatment are used; bath water is replaced and pools cleaned daily, and supply pipes are disinfected with chlorine-based chemicals.
Current adult admission is ¥650; elementary and junior-high students are ¥300, and younger children are free. The heated-stone area costs an additional ¥650 and includes facility wear, a large towel and a face towel.
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.
