KurokawaOnsen Resort is a part of Minami-oguni Town, located just about in the center of Kyushu, at the base of Kuju mountains. The spa resort is built along the upper stream valley of the Chikugo River, the longest river in Kyushu, at 700 meter elevation. Because of the landform, large hotels were never built there. Most hotels have ten to twenty-five guest rooms. This is one of the unique characteristics of KurokawaOnsen Resort. There are about 230 households in the town. Currently there are twenty-five association member hotels. Among them, four hotels have annex buildings.