Sanso Kosugian Ryokan features sulfur springs and local beef

Sanso Kosugian, a ryokan located in Yamakawa Onsen within Oguni Town, Kumamoto Prefecture, offers guests access to four distinct private baths. All four baths, including the Hinoki-no-yu, Iwa-buro, Hajimari-no-yu, and Seseragi-no-yu, feature 100% flowing sulfur springs.

The establishment serves local brand Akaushi beef, with dinner options including sukiyaki, shabu-shabu, and various hot pot styles, often paired with local Kumamoto shochu. The facility is situated near several major hot spring areas, including Kurokawa Onsen, Yufuin Onsen, and Beppu Onsen.

Looking ahead, the ryokan plans to expand in the spring of 2027 with the opening of a new restaurant and three detached villas, each featuring private open-air baths.