Hot spring
Sukayu Onsen (Sennin-buro, "thousand-person bath")
Aomori City area, Aomori Prefecture, JP
- Clothing optional
- All ages welcome
- Private, authorised
- Status unknown
Last checked Aug 2026
Sukayu Onsen (Sennin-buro, "thousand-person bath") is a hot-springs resort (traditional mixed nude bathing / konyoku) in Aomori City area, Aomori Prefecture, Japan, where clothing is optional. CLASSIFICATION NOTE: centuries-old Japanese mixed-gender bathing custom (konyoku), not a naturist/clothing-optional destination - no body-freedom ideology, purely hygiene/relaxation, photography and sexual conduct strictly taboo.
Know before you go
CLASSIFICATION NOTE: centuries-old Japanese mixed-gender bathing custom (konyoku), not a naturist/clothing-optional destination - no body-freedom ideology, purely hygiene/relaxation, photography and sexual conduct strictly taboo. Many women now decline the mixed bath or wear a thin wrap due to shifting comfort levels and foreign tourist presence. Do not equate with a nudist resort.
Frequently asked questions
Is clothing required at Sukayu Onsen (Sennin-buro, "thousand-person bath")?
This location is clothing optional: nudity is permitted, and you are free to stay dressed if you prefer.
Is Sukayu Onsen (Sennin-buro, "thousand-person bath") family-friendly or adults-only?
Sukayu Onsen (Sennin-buro, "thousand-person bath") is open to a general audience (all ages welcome).
Is nudity at Sukayu Onsen (Sennin-buro, "thousand-person bath") officially sanctioned?
This is a private property where nudity is authorised by the operator, subject to their own rules.
Can I visit Sukayu Onsen (Sennin-buro, "thousand-person bath") for the day?
Access: Day-trip and overnight guests; historic mixed bath plus separate single-sex baths available. Day access: Yes.
When is the best time to visit Sukayu Onsen (Sennin-buro, "thousand-person bath")?
Season: Year-round, popular in winter.
Official links
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