Located in the Izu Oshima Island, approximately 2 hours away from Tokyo by a ship, the resort hotel "Hotel Shiraiwa" overlooks the great view of Mt. Mihara. Oshima’s primeval camellia colors the natural hot spring’s water, which includes rich sodium caused by the eruption of Mt. Mihara. It is said to have the power to alleviate neuralgia, stomach aches, and cold constitution.