Hakone, a 90-minute train ride from Tokyo, offers some of Japan's finest hot-spring experiences for couples seeking intimacy. Hotels with private onsen (private-use hot-spring baths) allow partners to soak together without sharing the facility with other guests. Most properties in this category operate as ryokan-style hotels or resort properties that blend Western rooms with traditional tatami seating areas. Expect to pay from $129 per night for a standard double room, with prices rising to $250+ for suites that include in-room baths, mountain panoramas, and upgraded dining options.
Top-rated hotels like Hyatt Regency Hakone Resort and Spa in Gora features the area's largest spa and two indoor onsen, while The Prince Hakone Lake Ashinoko overlooks Lake Ashinoko with Mount Fuji views. For a quieter atmosphere, Hakone Retreat Foere in Sengokuhara offers forest-side outdoor baths and seasonal cuisine. Most properties include free parking, 24-hour front desk, and shuttle service to major sights like Owakudani Valley or Hakone Shrine. Book a room with a balcony or terrace at Hotel Green Plaza Hakone for open-air baths facing Mount Fuji-a choice that consistently ranks above 84/100 in guest scores.