Day Spa in Japan

Shibu Onsen, Nagano

Reservation-only private hot spring and sauna suites at a Nagano brewery complex, built around a craft beer bathing plan for two to four guests.

Nozawa Onsen, Nagano

A day-use hot spring facility a minute from the Nozawa Onsen ski lots, with a swimsuit-required outdoor bath, a source-fed viewing bath, sauna and gym.

Osaka

An upscale, reservation-only day spa in Osaka's Chuo Ward offering Japanese-ingredient facials and full-body massage treatments, closed Mondays.

Tokyo

Private-room head spa salon in Minami-Aoyama, Omotesando, offering 90- to 210-minute scalp treatments from roughly ¥24,750.

Osaka

A small day spa in Chuo Ward, Osaka, offering body treatments with a focus on balance and personal wellbeing, open daily afternoon into evening.