Modern and clean, featuring a sauna with automatic löyly and an exquisite free-flowing hot spring
Yamanashi Kofu City
Located near the entrance to Shosenkyo Gorge, Yamamiya Onsen is a clean day-use onsen sento beloved by locals. Its biggest appeal is the 100% natural hot spring flowing directly from the source with no added water. The soft chloride spring water constantly overflows from the baths. The sauna is a high-humidity Bona Sauna where you can experience strong heat thanks to automatic löyly that occurs once every hour. Features such as a cold plunge bath fed by free-flowing well water and outdoor tsubo baths make it feel more like a full-featured spa than a typical onsen sento, and its excellent value for money is a major reason for its popularity.
Typeindoor
In addition to an indoor bath fed directly from the source at about 38°C, there is a heated high-temperature bath and an outdoor tsubo bath that alternates between men and women daily, allowing you to enjoy the soft chloride spring water.
Sauna TypeDry Sauna
Stove Typefar_infrared
Capacity6people
A Bona Sauna with heat sources hidden under the benches and elsewhere. The room temperature is relatively low at 65–70°C, but the automatic löyly once an hour keeps the humidity high so you can work up a good sweat.
Water Qualitynatural
Capacity2people
A cold plunge bath where well water is poured in freely from a tap. It feels around 19°C to the touch and refreshes the body heated by the sauna.
Closed Days: None
2532-1 Yamamiya-cho, Kofu City, Yamanashi 400-0075, 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
Modern and clean, featuring a sauna with automatic löyly and an exquisite free-flowing hot spring
Yamanashi Kofu City
Located near the entrance to Shosenkyo Gorge, Yamamiya Onsen is a clean day-use onsen sento beloved by locals. Its biggest appeal is the 100% natural hot spring flowing directly from the source with no added water. The soft chloride spring water constantly overflows from the baths. The sauna is a high-humidity Bona Sauna where you can experience strong heat thanks to automatic löyly that occurs once every hour. Features such as a cold plunge bath fed by free-flowing well water and outdoor tsubo baths make it feel more like a full-featured spa than a typical onsen sento, and its excellent value for money is a major reason for its popularity.
Typeindoor
In addition to an indoor bath fed directly from the source at about 38°C, there is a heated high-temperature bath and an outdoor tsubo bath that alternates between men and women daily, allowing you to enjoy the soft chloride spring water.
Sauna TypeDry Sauna
Stove Typefar_infrared
Capacity6people
A Bona Sauna with heat sources hidden under the benches and elsewhere. The room temperature is relatively low at 65–70°C, but the automatic löyly once an hour keeps the humidity high so you can work up a good sweat.
Water Qualitynatural
Capacity2people
A cold plunge bath where well water is poured in freely from a tap. It feels around 19°C to the touch and refreshes the body heated by the sauna.
Closed Days: None
2532-1 Yamamiya-cho, Kofu City, Yamanashi 400-0075, 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