“Gokurakuyu Yokohama Serigaya Branch” is a super sento in Kounan Ward, Yokohama City, Kanagawa Prefecture, boasting one of the largest spaces in the area. You can fully enjoy Yokohama’s famous natural hot spring “kuroyu,” which gushes from 1,500 m underground, in the indoor baths and open-air baths. In particular, “kuroyu carbonate spring,” which combines black hot water and carbonated spring, is a luxurious bath where you can expect both skin-beautifying effects and improved circulation at the same time. The sauna is a large 4-tier tower sauna, where the powerful heat from far-infrared heaters efficiently promotes sweating. After cooling down in the cold plunge bath, you can spend a blissful relaxation time while feeling the pleasant breeze in the well-equipped outdoor air bath area, where more than 20 chairs are lined up.