HOTEL THE MITSUI HAKONE

Every one of the 126 rooms has its own bath fed by Kowakudani Onsen water that rises on the grounds. Some room types come with an open-air bath, and the spring water is a sodium chloride onsen. Since there is no communal bath or private-hire bath at the hotel, family bathing time centers on this in-room bath. The advantage is that you can bathe at a baby's or a young child's pace, without worrying about other guests.

This bathing facility in the hotel's spa area has a hushed indoor bath and an outdoor standing bath where the sky and the forest melt into the surface of the water. The same spa holds five private treatment rooms, including one couples room, along with a fitness gym, and there is also a sauna in the hotel, though its location is not specified. The fitness gym, however, is explicitly closed to children under 16, and whether children may use the bathing area or the sauna is not listed in our information. If you are counting on using them with children, you will need to confirm when you book.

The all-day dining restaurant Rivaline looks out on Mount Sengen from its indoor and terrace seats, serving grilled dishes from a show kitchen under a concept of local production for local consumption. The Japanese restaurant Sankei offers kaiseki, sushi and teppanyaki, with head chef Hiroyuki Kurosu, who has earned one Michelin star three years running. Room service is available, so you can also eat in your room after putting the children to bed.