The ultimate skin-beautifying experience, enjoyed through the synergistic effects of high-quality black hot spring water and carbonated baths
Kanagawa Yokohama City
"Ofuro no Ousama Seya Branch" is a large bathing facility in Megurocho, Seya Ward, Yokohama, Kanagawa Prefecture, boasting high-quality black hot spring water. The sodium bicarbonate spring that rises from underground is characterized by its dark brown color and silky texture on the skin. In addition to a free-flowing natural spring bath, it also offers a black hot spring carbonated bath that combines black water with high-concentration carbon dioxide, letting guests enjoy both skin-beautifying benefits and improved circulation at the same time. The sauna is a large four-tier tower sauna, where powerful heat from far-infrared heaters envelops the entire body. The cold plunge bath is 110 cm deep and spacious, providing a refreshing, brisk cool-down for a body heated by the sauna. Outdoor bathing in the open-air area is also pleasant, allowing guests to refresh both body and mind while forgetting the bustle of the city.
TypeNatural Hot Spring
A dark brown sodium bicarbonate spring rising from underground. Its smooth, uniquely viscous texture gently wraps the skin, and after bathing it leaves a feeling of lasting moisture, making it a true skin-beautifying hot spring. In the free-flowing natural spring bath, guests can fully enjoy the freshness of the water and the comforting warmth that continues to spread from the core of the body.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity20people
A spacious, four-tier tower-style sauna room. Stable heat from far-infrared heaters evenly fills the room, warming the body gradually from the core. The double-door design helps keep the heat from escaping, making it easy to enjoy consistently powerful warmth. This main sauna lets guests enjoy sweating at their own pace while watching TV.
Water QualityTap Water
Capacity10people
A wide, deep cold plunge bath boasting a water depth of 110 cm. It fully envelops a body heated by the sauna and delivers an overwhelmingly refreshing cool-down that quickly tightens the body. Its generous size lets guests experience a comfortable cooldown without worrying about those around them. The flow to the outdoor bathing area is also smooth, making it the perfect gateway to totonou.
Closed Days: None
246-0007 24-6 Megurocho, Seya Ward, Yokohama City, Kanagawa 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
The ultimate skin-beautifying experience, enjoyed through the synergistic effects of high-quality black hot spring water and carbonated baths
Kanagawa Yokohama City
"Ofuro no Ousama Seya Branch" is a large bathing facility in Megurocho, Seya Ward, Yokohama, Kanagawa Prefecture, boasting high-quality black hot spring water. The sodium bicarbonate spring that rises from underground is characterized by its dark brown color and silky texture on the skin. In addition to a free-flowing natural spring bath, it also offers a black hot spring carbonated bath that combines black water with high-concentration carbon dioxide, letting guests enjoy both skin-beautifying benefits and improved circulation at the same time. The sauna is a large four-tier tower sauna, where powerful heat from far-infrared heaters envelops the entire body. The cold plunge bath is 110 cm deep and spacious, providing a refreshing, brisk cool-down for a body heated by the sauna. Outdoor bathing in the open-air area is also pleasant, allowing guests to refresh both body and mind while forgetting the bustle of the city.
TypeNatural Hot Spring
A dark brown sodium bicarbonate spring rising from underground. Its smooth, uniquely viscous texture gently wraps the skin, and after bathing it leaves a feeling of lasting moisture, making it a true skin-beautifying hot spring. In the free-flowing natural spring bath, guests can fully enjoy the freshness of the water and the comforting warmth that continues to spread from the core of the body.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity20people
A spacious, four-tier tower-style sauna room. Stable heat from far-infrared heaters evenly fills the room, warming the body gradually from the core. The double-door design helps keep the heat from escaping, making it easy to enjoy consistently powerful warmth. This main sauna lets guests enjoy sweating at their own pace while watching TV.
Water QualityTap Water
Capacity10people
A wide, deep cold plunge bath boasting a water depth of 110 cm. It fully envelops a body heated by the sauna and delivers an overwhelmingly refreshing cool-down that quickly tightens the body. Its generous size lets guests experience a comfortable cooldown without worrying about those around them. The flow to the outdoor bathing area is also smooth, making it the perfect gateway to totonou.
Closed Days: None
246-0007 24-6 Megurocho, Seya Ward, Yokohama City, Kanagawa 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