One of the communal bathhouses located in the venerable Futsukaichi Onsen, which is said by the Kuroda Domain in the Edo period to have an onsen magistrate. It is a day-trip bathing facility created as a place of communication for citizens under the official name of Ozen-yu, Musashito-ku, Chikushi-shi. The first floor is a bathhouse where there is a bubble and a whirlpool, and the rest room on the second floor is charged. It operates under the motto of clean and safe hot spring facilities.

It is located in Futsukaichi Onsen, the oldest hot spring in Kyushu, which springs from the Asuka period 1350 years ago, and is the oldest day-trip hot spring in Fukuoka Prefecture, which is established in the Edo period. The water of the water and the water of the bath, which are poured from the source of the premises, are very fresh hot water with the scent of sulfur. It was also called Yakushiyu because of the Yakushiki Nyorai Yuen of Musashi-ji Temple, which is nearby and the oldest Buddhist temple in Kyushu. It is said that the medicine master can cure the disease to extend the life of the disease and save the disease. There are two great halls on the second floor where you can rest for free, and you can use them freely. They also sell coffee and oyster ice (spring to summer) in drinking source water.

You can take a day bath with lunch at a pure Japanese-style inn in Futsuichi Onsen, which has a beautiful garden of 3000 tsubo. Futsukaichi Onsen is a hot spring with a history dating from 1360, which was also sung in Man'yōshū. The Daiyakuba Tsujida no Yu is about 100 tsubo in size, and the source of the water is directly poured into the Yufune. Meals that stick to seasonal materials are also reputed.