Bath
TypeNatural Hot Spring
Large public baths that alternate by gender daily. Especially from the open-air bath Kuuka, you can enjoy the breathtaking scenery where the sea and sky of Amakusa meet.
Enjoy Amakusa's ocean views and the sauna
Kumamoto Kamiamakusa City
Oyano Yanagiko Onsen Komatsuya Nagisakan is a hot spring ryokan with spectacular views of the sea of Amakusa. The bathing facilities, available to overnight guests only, include a dry sauna and a cold plunge bath, and the open-air baths, which alternate by gender daily, offer a sweeping panorama of Amakusa. Enjoy fresh seafood cuisine while taking a restorative moment for mind and body.
TypeNatural Hot Spring
Large public baths that alternate by gender daily. Especially from the open-air bath Kuuka, you can enjoy the breathtaking scenery where the sea and sky of Amakusa meet.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity3people
A compact dry sauna equipped with a far-infrared heater. The silent space, with no TV or background music, lets you quietly focus on yourself and work up a good sweat.
Water QualityTap Water
Capacity2people
A cold plunge bath located just beside the sauna. You can pour water from the tap at your preferred flow, and its mild temperature lets you slowly cool down.
Closed Days: None
10044-3 Naka, Oyano, Kamiamakusa City, Kumamoto Prefecture 869-3603, Japan
Gender Access
Gender Separated

Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more
Enjoy Amakusa's ocean views and the sauna
Kumamoto Kamiamakusa City
Oyano Yanagiko Onsen Komatsuya Nagisakan is a hot spring ryokan with spectacular views of the sea of Amakusa. The bathing facilities, available to overnight guests only, include a dry sauna and a cold plunge bath, and the open-air baths, which alternate by gender daily, offer a sweeping panorama of Amakusa. Enjoy fresh seafood cuisine while taking a restorative moment for mind and body.
TypeNatural Hot Spring
Large public baths that alternate by gender daily. Especially from the open-air bath Kuuka, you can enjoy the breathtaking scenery where the sea and sky of Amakusa meet.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity3people
A compact dry sauna equipped with a far-infrared heater. The silent space, with no TV or background music, lets you quietly focus on yourself and work up a good sweat.
Water QualityTap Water
Capacity2people
A cold plunge bath located just beside the sauna. You can pour water from the tap at your preferred flow, and its mild temperature lets you slowly cool down.
Closed Days: None
10044-3 Naka, Oyano, Kamiamakusa City, Kumamoto Prefecture 869-3603, Japan
Gender Access
Gender Separated

Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more