Funabori, Edogawa, Tokyo
Otomeyu
A black-water sento with a natural-spring cold pool beside the semi-outdoor bath and a full sauna cooling route. The hot semi-outdoor bath is not confirmed as source-flowing; Tsurunoyu has clearer evidence if that is your priority.
Facility photos
Check before bathing
- Opening hours
- Weekdays 15:00–23:00; Sundays and public holidays 14:00–23:00. Closed Mondays, moving to Tuesday when Monday is a public holiday. Tokyo's adult bath rate is ¥600 from 2026-08-01; current facility listings show a sauna surcharge, with one August 2026 secondary listing giving ¥1,000 for bath plus sauna. Free parking for 15 cars is listed.
- Tattoo policy
- Current official pages do not fully publish tattoo rules; call ahead if this is a requirement.
Spring & water temperature
- Spring-source temperature
- Not published as a current value. Older analyses are not treated as 2026 figures.
- Bathing temperature
- Not published as a fixed value. Dated 2019 visitor observations of about 42°C for the black-water hot bath and about 22°C for the spring-water cold pool are not current guaranteed settings.
- Spring classification
- Natural black-water spring; the current local government page does not publish a complete spring classification for this facility.
- pH
- About 8.5 in secondary transcriptions of the 2019 analysis; not a 2026 retest.
- Flow rate
- About 120 L/min in the secondary transcription of the 2019 analysis; not a 2026 retest.
- Water handling
- Current official information confirms black spring water in the semi-outdoor area and identifies the adjacent cold bath as spring water. It does not label the hot semi-outdoor pool source-flowing or publish pool-by-pool water treatment. Do not copy Tsurunoyu's outdoor-bath supply description to Otomeyu.
The water in the cold pool and hot semi-outdoor bath has distinct evidence; neither should be generalized to the whole facility.
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.
