Nyuto Onsenkyo, Akita Prefecture
Kuroyu Onsen, Nyuto Onsenkyo
A strong seasonal choice for a mountain hot-spring stay, several bathing areas and private-bath options. It is less suitable in winter or if you need step-free access or an easy car-free visit.
Facility photos
Check before bathing
- Opening hours
- Seasonal operation, generally from mid-April to early November. Day visits: Thursday–Tuesday 09:00–16:30, last admission 16:00; Wednesday 09:00–11:00, last admission 10:30. Holiday hours may change.
Spring & water temperature
- Spring-source temperature
- No current fixed figure confirmed.
- Bathing temperature
- Not published.
- Spring source
- The Kuroyu Onsen spring group.
- Spring classification
- Simple sulfur spring, the main classification used in the inn's current information.
- pH
- Not published in the current review.
- Flow rate
- Not published in the current review.
- Water handling
- The inn lists separate-gender indoor and outdoor baths, a waterfall bath, mixed indoor and outdoor baths, and private Kame-no-yu and Tamahada-no-yu baths. Its current main pages do not fully publish water addition, heating, circulation or disinfection conditions for every bath, so no single treatment method is assumed for all of them.
Bathing indications
The inn highlights its sulfur spring and the area's bathing history. No individual treatment outcome is promised.
The 2026 season reopened on 15 April and is listed as running roughly through early November. Adult day admission is ¥800 and elementary-school children ¥400. Private baths are ¥2,750 per 45-minute session, plus bathing tax. The buildings include slopes, level changes and stairs. Holiday hours may change; verify before visiting. Tattoo policy is 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.
