Kamata Onsen 蒲田温泉

Kamata Onsen is a bathhouse in Tokyo's Ota-ku, known for its black water, called Kuroyu. The facility has two Kuroyu bathtubs, one with high temperature and one with low temperature, and also offers other baths like a Jacuzzi with an electric bath, a cold water bath, and a sauna. On the second floor, there is a dining room and banquet hall that serves as a social gathering place for local residents.

Source: denshaonsen.com ↗, read 2026-09-10