Established over 380 years ago, Ichinoyu Honkan in Hakone offers both indoor and outdoor hot-spring baths. The air-conditioned rooms are equipped with tatami floors, Japanese futon bedding, a TV, Wi-Fi, a fridge, and an electric kettle with green tea. Guests receive Japanese Yukata robes, and select rooms include a private open-air bath. The inn also provides massage and facial treatments, a private reservable hot-spring bath, and a souvenir shop featuring local products. Luggage storage is available at the front desk, and guests can access hot-spring baths at nearby properties free of charge. Traditional multi-course dinners featuring local Hakone pork are served, along with a complimentary Japanese breakfast set.