Exceptional relaxation brought on by an amber-colored natural hot spring and a stadium sauna
Tokyo Toshima City
"Tokyo Somei Onsen SAKURA" is a day-use hot spring facility in Komagome, Toshima Ward, Tokyo. The natural hot spring that gushes forth in the land where Somei Yoshino cherries originated is an amber-colored, highly saline chloride spring that bubbles up from 1800 m underground and offers excellent heat-retention and moisturizing effects. The sauna is a 7-tier stadium-style sauna, and the automatic löyly from the Izness stove drives powerful sweating. The cold plunge bath, which uses nano water, feels smooth on the skin and is built to a substantial depth. In a calm space overlooking a Japanese garden, you can spend a moment away from the bustle of the city.
TypeNatural Hot Spring
A sodium-iodide-chloride highly saline spring that gushes up from 1800 m underground. It is unusual in Tokyo for emerging colorless and transparent, then turning a beautiful amber when exposed to air. Rich in natural minerals, it is renowned as a beauty bath that leaves the skin smooth. With excellent heat retention, the warmth lasts even after you get out of the bath.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity35people
A spacious stadium sauna with 7 tiers of seating. It uses both a gas stove and an Izness stove, and automatic löyly is performed every hour at 30 minutes past. The higher you go, the more intense the heat becomes, allowing you to experience powerful sweating. The roomy interior offers an open feel and creates a space where you can relax and focus on yourself.
Sauna TypeMist Sauna
Capacity9people
A mist sauna installed only in the women’s bath area. The low temperature lets you warm up slowly and thoroughly, with less strain on the skin and a high relaxing effect. Fine mist envelops the whole body, providing moisture while gently encouraging perspiration.
Water QualitySoft Water
Capacity10people
A cold plunge bath using nano water that feels exceptionally smooth on the skin. With a depth of 80 cm to 110 cm, it cools the entire body thoroughly. Set at a comfortable temperature of around 18°C, it gently yet effectively firms up a body heated by the sauna.
Closed Days: None
5-4-24 Komagome, Toshima Ward, Tokyo 170-0003
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
Exceptional relaxation brought on by an amber-colored natural hot spring and a stadium sauna
Tokyo Toshima City
"Tokyo Somei Onsen SAKURA" is a day-use hot spring facility in Komagome, Toshima Ward, Tokyo. The natural hot spring that gushes forth in the land where Somei Yoshino cherries originated is an amber-colored, highly saline chloride spring that bubbles up from 1800 m underground and offers excellent heat-retention and moisturizing effects. The sauna is a 7-tier stadium-style sauna, and the automatic löyly from the Izness stove drives powerful sweating. The cold plunge bath, which uses nano water, feels smooth on the skin and is built to a substantial depth. In a calm space overlooking a Japanese garden, you can spend a moment away from the bustle of the city.
TypeNatural Hot Spring
A sodium-iodide-chloride highly saline spring that gushes up from 1800 m underground. It is unusual in Tokyo for emerging colorless and transparent, then turning a beautiful amber when exposed to air. Rich in natural minerals, it is renowned as a beauty bath that leaves the skin smooth. With excellent heat retention, the warmth lasts even after you get out of the bath.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity35people
A spacious stadium sauna with 7 tiers of seating. It uses both a gas stove and an Izness stove, and automatic löyly is performed every hour at 30 minutes past. The higher you go, the more intense the heat becomes, allowing you to experience powerful sweating. The roomy interior offers an open feel and creates a space where you can relax and focus on yourself.
Sauna TypeMist Sauna
Capacity9people
A mist sauna installed only in the women’s bath area. The low temperature lets you warm up slowly and thoroughly, with less strain on the skin and a high relaxing effect. Fine mist envelops the whole body, providing moisture while gently encouraging perspiration.
Water QualitySoft Water
Capacity10people
A cold plunge bath using nano water that feels exceptionally smooth on the skin. With a depth of 80 cm to 110 cm, it cools the entire body thoroughly. Set at a comfortable temperature of around 18°C, it gently yet effectively firms up a body heated by the sauna.
Closed Days: None
5-4-24 Komagome, Toshima Ward, Tokyo 170-0003
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