Founded in 1937, this sauna and bathhouse is known for its kuroyu, one of the richest in concentration in Tokyo, and its powerful heat
Tokyo Ota City
"Kamata Onsen" is a long-established sento in Ota City, Tokyo, founded in 1937. Its signature feature is kuroyu, a jet-black natural hot spring known for being one of the richest in concentration in Tokyo. Celebrated as a skin-beautifying bath that leaves the skin smooth, it offers both intensely hot water and comfortably warm water, so you can enjoy two different bathing experiences. The sauna, renewed in 2023, has powerful far-infrared heat that feels pleasant, and the calm lighting makes it easy to focus inward. The compact one-person cold plunge bath is ideal for alternating with the kuroyu. On the second floor, you can also try the specialty kamameshi at the dining area, all while relaxing in the warm, nostalgic atmosphere of an old downtown neighborhood.
TypeNatural Hot Spring
A jet-black natural hot spring known for its exceptionally rich concentration. It is a sodium hydrogen carbonate and chloride cold mineral spring, and is widely regarded as a skin-beautifying bath that leaves the skin silky smooth. With both hot water above 45 degrees and comfortably warm water, you can enjoy the appeal of the kuroyu to suit your preference.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity8people
A dry sauna renewed in 2023, with calm lighting that leaves a strong impression. Powerful far-infrared heat warms the body from within and encourages a comfortable sweat. You can relax in a clean room while still feeling the atmosphere of a long-established bathhouse.
Water QualityTap Water
Capacity1people
A compact tub for one person. The water flow makes it feel sharply cold, gently tightening a body heated by the hot kuroyu bath. It offers a calm cool-down that feels true to a downtown sento.
Closed Days: None
〒144-0053 2-23-2 Kamata Honcho, Ota City, Tokyo
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
Founded in 1937, this sauna and bathhouse is known for its kuroyu, one of the richest in concentration in Tokyo, and its powerful heat
Tokyo Ota City
"Kamata Onsen" is a long-established sento in Ota City, Tokyo, founded in 1937. Its signature feature is kuroyu, a jet-black natural hot spring known for being one of the richest in concentration in Tokyo. Celebrated as a skin-beautifying bath that leaves the skin smooth, it offers both intensely hot water and comfortably warm water, so you can enjoy two different bathing experiences. The sauna, renewed in 2023, has powerful far-infrared heat that feels pleasant, and the calm lighting makes it easy to focus inward. The compact one-person cold plunge bath is ideal for alternating with the kuroyu. On the second floor, you can also try the specialty kamameshi at the dining area, all while relaxing in the warm, nostalgic atmosphere of an old downtown neighborhood.
TypeNatural Hot Spring
A jet-black natural hot spring known for its exceptionally rich concentration. It is a sodium hydrogen carbonate and chloride cold mineral spring, and is widely regarded as a skin-beautifying bath that leaves the skin silky smooth. With both hot water above 45 degrees and comfortably warm water, you can enjoy the appeal of the kuroyu to suit your preference.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity8people
A dry sauna renewed in 2023, with calm lighting that leaves a strong impression. Powerful far-infrared heat warms the body from within and encourages a comfortable sweat. You can relax in a clean room while still feeling the atmosphere of a long-established bathhouse.
Water QualityTap Water
Capacity1people
A compact tub for one person. The water flow makes it feel sharply cold, gently tightening a body heated by the hot kuroyu bath. It offers a calm cool-down that feels true to a downtown sento.
Closed Days: None
〒144-0053 2-23-2 Kamata Honcho, Ota City, Tokyo
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