Find relaxation in Numazu's blast-style hot air sauna and gentle underground natural water
Shizuoka Numazu City
"Natural Hot Spring Zabun" is a super sento in Numazu, Shizuoka Prefecture. It features two authentic sauna types for both men and women, and the "Hot Air Sauna" in particular offers a powerful blast of automatic löyly and fan-driven air every 30 minutes. The other, the "Finland Sauna," uses Mount Fuji lava stones and is set for high-humidity, slow and steady sweating. The cold plunge bath uses underground natural water with a gentle feel on the skin, and cooling down in the open-air rest area is pure bliss. The natural hot spring brought from the foot of Mount Fuji is also popular.
TypeNatural Hot Spring
A natural hot spring transported directly from Izu City. It is characterized by a smooth texture and low irritation to the skin. Its strong heat-retention effect keeps you warmly comfortable for a long time after bathing, gently easing away daily fatigue from deep within.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity20people
A sauna room characterized by automatic löyly that activates every 30 minutes and powerful automatic fan circulation. Ceramic sauna stones retain heat, while humid waves of heat envelop your whole body at once for a true blast-style experience. A powerful sweating space popular with sauna enthusiasts seeking intense heat.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity20people
A calm, relaxing sauna room that uses Mount Fuji lava stone for its stones. Automatic löyly every 20 minutes keeps the room at a comfortable level of humidity at all times. The far-infrared effect of the lava stone gently warms you from the inside out, allowing you to enjoy a mild, deeply relaxing experience different from the Hot Air Sauna.
Water Qualitywell
Capacity5people
A cold plunge bath luxuriously filled with underground natural water. The water is extremely smooth and easy on the skin, with a gentle touch that feels soft despite the cold. It cools down your heated body after sauna time gently yet thoroughly. An open-air rest area with a roof is adjacent, allowing a smooth transition into rest.
Closed Days: None
2-14-8 Haramachi Naka, Numazu, Shizuoka Prefecture
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 moreFind relaxation in Numazu's blast-style hot air sauna and gentle underground natural water
Shizuoka Numazu City
"Natural Hot Spring Zabun" is a super sento in Numazu, Shizuoka Prefecture. It features two authentic sauna types for both men and women, and the "Hot Air Sauna" in particular offers a powerful blast of automatic löyly and fan-driven air every 30 minutes. The other, the "Finland Sauna," uses Mount Fuji lava stones and is set for high-humidity, slow and steady sweating. The cold plunge bath uses underground natural water with a gentle feel on the skin, and cooling down in the open-air rest area is pure bliss. The natural hot spring brought from the foot of Mount Fuji is also popular.
TypeNatural Hot Spring
A natural hot spring transported directly from Izu City. It is characterized by a smooth texture and low irritation to the skin. Its strong heat-retention effect keeps you warmly comfortable for a long time after bathing, gently easing away daily fatigue from deep within.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity20people
A sauna room characterized by automatic löyly that activates every 30 minutes and powerful automatic fan circulation. Ceramic sauna stones retain heat, while humid waves of heat envelop your whole body at once for a true blast-style experience. A powerful sweating space popular with sauna enthusiasts seeking intense heat.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity20people
A calm, relaxing sauna room that uses Mount Fuji lava stone for its stones. Automatic löyly every 20 minutes keeps the room at a comfortable level of humidity at all times. The far-infrared effect of the lava stone gently warms you from the inside out, allowing you to enjoy a mild, deeply relaxing experience different from the Hot Air Sauna.
Water Qualitywell
Capacity5people
A cold plunge bath luxuriously filled with underground natural water. The water is extremely smooth and easy on the skin, with a gentle touch that feels soft despite the cold. It cools down your heated body after sauna time gently yet thoroughly. An open-air rest area with a roof is adjacent, allowing a smooth transition into rest.
Closed Days: None
2-14-8 Haramachi Naka, Numazu, Shizuoka Prefecture
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