This place is easily the best place we stayed at during our Japan trip, and possibly the best overall experience I've had in a one-night stay ever. You have your own onsen in the room, along with two private onsens in the hotel (free, no reservations required to use). The traditional room is large for Japanese hotel standards, the hotel is a 15-minute walk to Hakone station, and the staff have mind-blowing hospitality! Highly recommend