Onogawa Onsen, Yonezawa, Yamagata Prefecture
Onogawa Onsen Communal Bath Amayu
The lowest-cost way to try Onogawa's characteristically hot communal bath. It is easy to find on a first visit, but expect a simple setup and water the official site describes as hot.
Check before bathing
- Opening hours
- 07:00–21:00, open daily. The current official website uses this shorter schedule; a printed guide still lists 05:00–22:00.
- Tattoo policy
- The current profile material does not include a confirmed tattoo policy. Ask the bath before visiting.
Spring & water temperature
- Spring-source temperature
- Not published for Amayu. District figures of about 80°C for source No. 4 and 35–36°C for source No. 5 are not treated as this bath's source temperatures.
- Bathing temperature
- Not published as a fixed setting. The official site describes the water as hotter than Taki-no-Yu.
- Spring source
- Onogawa Onsen's shared supply. The district says it blends high-temperature source No. 4 with lower-temperature source No. 5, but the exact sources and blend ratio used by Amayu are not published.
- Spring classification
- Sulfur-bearing sodium-calcium chloride spring, the district's official classification.
- pH
- Not published for Amayu; district-wide pH figures are not substituted.
- Flow rate
- Not published for Amayu; the district's total flow is not allocated to this bath.
- Water handling
- The Onogawa Onsen site describes Amayu as source-flowing. The current pages do not publish complete pool-by-pool details for water addition, heating, circulation or disinfection, so no further treatment is inferred.
Bathing indications
The district site lists general indications for chloride springs. A current analysis specific to Amayu was not confirmed, and no treatment effect is promised.
Source-flowing use is confirmed; further pool-treatment details are not published.
Admission is ¥200, with a ticket machine at the entrance and six dedicated parking spaces. Tattoo rules are unconfirmed.
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.
