JP / OPEN NUDITY
Kotan no Yu
A lakeside open-air hot spring by Lake Kussharo. The official tourism guide says the men's and women's sides are divided by large rocks and that swimsuits or towel wraps are also allowed.
OPEN-AIR NUDITY CONTEXT — This is a non-sexual place listing, not permission to be nude outside its designated or documented setting. Check the official source, local signage and current rules before visiting.
LOCAL NOTE — Coverings are permitted; check current maintenance days and posted etiquette.
LOCAL NOTE — Coverings are permitted; check current maintenance days and posted etiquette.
- Country
- Japan / Teshikaga
- Category
- OPEN NUDITY
- Context
- naturism
- Listing status
- ONGOING
- Relation
- ADJACENT
- Age rule
- Non-sexual semi-mixed outdoor hot spring; follow current local rules
- Participation
- participate
- Male undress
- optional
- Female side
- mixed
- Sexual context
- No
- Source quality
- official
- Map precision
- region
- Open air
- Yes
- Nudity setting
- OPEN AIR ONSEN
- Nudity rule
- COVERING ALLOWED
- Nudity evidence
- EXPLICIT
- Verified / reviewed
- 2026-08-14