Spa by sisley／ふふ 熱海

Spa by Sisley sits inside the Fufu Atami hotel in Shizuoka's Atami hot-spring town, running from 10:00 to 22:00 daily with last bookings at 21:00 (60-minute treatments only after that hour). The menu leans on Sisley's plant-derived formulas and all-hand techniques, built around facials, body work and shorter add-ons rather than a soaking-pool culture.

The signature is the Phyto Aromatic Facial, a basic 60-minute treatment customized to skin type (hydrating, radiance, purifying and so on) and priced from 20,000 yen. Longer anti-aging facials using Sisleÿa or Supremya products run up to 90 minutes and climb toward 40,000 yen, while body treatments range from 45-minute leg and foot work to 120-minute full customized sessions. A dry-head scalp ritual and shoulder/head pressure treatments are also on offer for shorter breaks.

Facilities include a sauna, steam room, thermal pool and relaxation lounge, and parking can be arranged on request. Staff work in English and Japanese. The spa is adults-only, with a minimum age of 16, and couples can book treatments together, though simultaneous two-person slots depend on availability. Mobile phone use is discouraged inside to keep the space quiet, and pregnant guests are limited to facial treatments. Reservations are required, changes or cancellations should be made by the day before, and same-day cancellations are charged 50% of the course fee. Listed prices include tax and service charge.