Matsushiro Onsen
TypeNatural Hot Spring
A sodium-calcium chloride and bicarbonate cold mineral spring. The water is expected to be beneficial for sensitivity to cold and for recovery from fatigue.
A new style of day-use onsen where you can cocoon yourself and relax all day
Nagano Nagano City
Kotori no Yu in Matsushiro, Nagano City is a day-use onsen that features a relaxation area and café stocked with 10,000 books and comics, allowing you to cocoon yourself and relax all day. The facility offers a scenic open-air bath overlooking the Zenkoji Plain, a low-temperature steam sauna that is gentle on the body, and a flow-through cold plunge bath, providing a restorative space to refresh both body and mind.
TypeNatural Hot Spring
A sodium-calcium chloride and bicarbonate cold mineral spring. The water is expected to be beneficial for sensitivity to cold and for recovery from fatigue.
Sauna TypeMist Sauna
Capacity4people
A low-temperature steam sauna that gently warms the body at about 50–65°C. Recommended for those who find high-heat saunas difficult, it can help boost metabolism.
Water Qualitytap
Capacity2people
A flow-through cold plunge bath using tap water located next to the steam sauna. Water temperature is about 16–20°C, making it ideal for a mild cooldown after the steam sauna.
Closed Days: Thursday
2832 Tojo, Matsushiro-machi, Nagano City, Nagano 381-1221, Japan
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
A new style of day-use onsen where you can cocoon yourself and relax all day
Nagano Nagano City
Kotori no Yu in Matsushiro, Nagano City is a day-use onsen that features a relaxation area and café stocked with 10,000 books and comics, allowing you to cocoon yourself and relax all day. The facility offers a scenic open-air bath overlooking the Zenkoji Plain, a low-temperature steam sauna that is gentle on the body, and a flow-through cold plunge bath, providing a restorative space to refresh both body and mind.
TypeNatural Hot Spring
A sodium-calcium chloride and bicarbonate cold mineral spring. The water is expected to be beneficial for sensitivity to cold and for recovery from fatigue.
Sauna TypeMist Sauna
Capacity4people
A low-temperature steam sauna that gently warms the body at about 50–65°C. Recommended for those who find high-heat saunas difficult, it can help boost metabolism.
Water Qualitytap
Capacity2people
A flow-through cold plunge bath using tap water located next to the steam sauna. Water temperature is about 16–20°C, making it ideal for a mild cooldown after the steam sauna.
Closed Days: Thursday
2832 Tojo, Matsushiro-machi, Nagano City, Nagano 381-1221, Japan
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