Natural hot springs with free-flowing source water that changes color daily, plus a full range of sauna facilities
Osaka Sakai City
"Kuramae Onsen Sarasa no Yu" is a day-use hot spring facility in Sakai City, Osaka Prefecture. It is designated as a therapeutic spring with medically recognized therapeutic benefits, and guests can enjoy a fresh chlorinated spring with free-flowing source water that changes from blackish brown to light brown depending on the day. The sauna facilities include a tiered tower sauna, as well as steam and salt saunas available on alternating days for men and women. A cold plunge bath is also available, allowing guests to experience a deeply relaxing hot-and-cold contrast bath with high-quality natural hot spring water and sauna sessions.
TypeNatural Hot Spring
A chlorinated spring that gushes from 1350 m underground. Its distinctive feature is the way its color changes from blackish brown to brownish red, or even greenish-yellow, depending on the day. Rich in dissolved substances such as salt, it offers excellent heat retention. In the open-air bath, it is provided as free-flowing source water, allowing you to feel its powerful bathing sensation throughout your body.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity25people
A stadium-style sauna room with tiered seating, allowing you to choose your preferred level of heat depending on where you sit. Far-infrared heat warms the body from the core, and with moderate humidity from auto löyly, you can work up a thorough sweat.
Sauna TypeSteam Sauna
Capacity8people
Steam sauna and salt sauna available on alternating days for men and women. Soft steam gently envelops the body and leaves the skin feeling moisturized. In the salt sauna, the osmotic effect of dissolved salt helps draw out impurities and leaves the skin smooth and refreshed after bathing.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity10people
A cold plunge bath using groundwater, located very close to the sauna. It rapidly cools the body after you have warmed up to your limit in the sauna, tightens the pores, and provides an exquisite cooldown.
Closed Days: None
591-8004 1-3-5 Kuramae-cho, Kita Ward, Sakai City, Osaka 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
Natural hot springs with free-flowing source water that changes color daily, plus a full range of sauna facilities
Osaka Sakai City
"Kuramae Onsen Sarasa no Yu" is a day-use hot spring facility in Sakai City, Osaka Prefecture. It is designated as a therapeutic spring with medically recognized therapeutic benefits, and guests can enjoy a fresh chlorinated spring with free-flowing source water that changes from blackish brown to light brown depending on the day. The sauna facilities include a tiered tower sauna, as well as steam and salt saunas available on alternating days for men and women. A cold plunge bath is also available, allowing guests to experience a deeply relaxing hot-and-cold contrast bath with high-quality natural hot spring water and sauna sessions.
TypeNatural Hot Spring
A chlorinated spring that gushes from 1350 m underground. Its distinctive feature is the way its color changes from blackish brown to brownish red, or even greenish-yellow, depending on the day. Rich in dissolved substances such as salt, it offers excellent heat retention. In the open-air bath, it is provided as free-flowing source water, allowing you to feel its powerful bathing sensation throughout your body.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity25people
A stadium-style sauna room with tiered seating, allowing you to choose your preferred level of heat depending on where you sit. Far-infrared heat warms the body from the core, and with moderate humidity from auto löyly, you can work up a thorough sweat.
Sauna TypeSteam Sauna
Capacity8people
Steam sauna and salt sauna available on alternating days for men and women. Soft steam gently envelops the body and leaves the skin feeling moisturized. In the salt sauna, the osmotic effect of dissolved salt helps draw out impurities and leaves the skin smooth and refreshed after bathing.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity10people
A cold plunge bath using groundwater, located very close to the sauna. It rapidly cools the body after you have warmed up to your limit in the sauna, tightens the pores, and provides an exquisite cooldown.
Closed Days: None
591-8004 1-3-5 Kuramae-cho, Kita Ward, Sakai City, Osaka 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