Hiki stargazing sauna

Hiki stargazing sauna is a reservation-based sauna on the fifth floor of the Nekoyacho Building in Naka-ku, where guests heat up while looking out on a small courtyard garden and cool off in a semi-outdoor rest area under the sky. The sauna has a cold plunge, and sessions are men's by default with ladies' days on Mondays and Friday daytimes. Tattoos are accepted, swimwear is optional, and groups of up to nine can hire the whole space.

Monday: 10:30 AM – 10:00 PM (ladies' day); Tuesday: 10:30 AM – 11:00 PM; Wednesday: 10:30 AM – 9:00 PM; Thursday: 10:30 AM – 11:00 PM; Friday: 10:30 AM – 4:00 PM (ladies) and 5:00 PM – 11:00 PM (men); Saturday: 10:30 AM – 11:00 PM; Sunday: 9:00 AM – 8:00 PM