CYCL

It sits in a Special Zone of the national park the Ministry of the Environment administers, where what can be built is tightly bounded. Momoeda Yu designed it inside those limits, with creative direction by Kawanami Hiroaki and construction by Marumasa Watanabe Komusho. It took a place in the Public Architecture category of the iF Design Award 2025, and a special prize at the Dedalo Minosse international architecture prize the same year, whose ceremony is held in Palladio's Teatro Olimpico.

Bathing is mixed and swimsuits are worn, with rental available; changing rooms, showers and the cold baths are separate. The sauna is Finnish, with self-service loyly. The cold water is Fuji groundwater, ninety litres a minute, run through rather than recirculated, and clean enough to drink. Cooling off happens outside on the lakeside deck that opened in July 2025, on loungers set above the shore with nothing in front of them.

Two and a half hours costs 4,290 yen, thirty minutes more 770 yen, both including a towel set and the drinks and sweets in the lounge. Kayaks and paddleboards run on the lake in summer, gravel bikes from late November. Entry is capped when it is busy, so book.