Oshino Hot Spring (Oshino Onsen)
TypeNatural Hot Spring
A natural hot spring classified as a sodium chloride and bicarbonate spring. It is weakly alkaline with a pH of 8.2 and is reputed as a 'beauty' hot spring that leaves skin smooth.
Enjoy a fulfilling time with a wide variety of baths and saunas
Oita Oita City
Oshino Hot Spring Hanamaru-no-Yu (Oshino Onsen Hanamaru-no-Yu) is located in a quiet residential area of Oita City. It offers a variety of baths, including a free-flowing natural hot spring that is alkaline and known as a 'beauty' spring, outdoor baths, a carbonated spring, and a bedrock spa. The facility has two types of saunas, a hot dry sauna and a steam sauna, with a well-chilled cold plunge bath positioned right next to the sauna room. The outdoor area also features deck chairs for open-air cooling, and since the facility is open until 2:00 AM, you can relax and refresh even late at night.
TypeNatural Hot Spring
A natural hot spring classified as a sodium chloride and bicarbonate spring. It is weakly alkaline with a pH of 8.2 and is reputed as a 'beauty' hot spring that leaves skin smooth.
Sauna TypeDry Sauna
Stove Typegas
Capacity15people
A spacious dry sauna with a large stove and three-tier seating. Humidity is kept at a moderate level, which raises the perceived temperature so you can break a good sweat.
Sauna TypeSteam Sauna
Stove Typeelectric
Capacity5people
A gentle steam sauna that warms the body, recommended for those who prefer a milder option than a dry sauna.
Water Qualitytap
Capacity3people
Located right next to the sauna room for excellent flow, this cold plunge bath features a long, deep tub chilled to about 16℃ to pleasantly tighten your heated body.
Closed Days: None
984 Oshino, Oshino Hanamaru Town, Oita City, Oita Prefecture 870-1121, 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
Enjoy a fulfilling time with a wide variety of baths and saunas
Oita Oita City
Oshino Hot Spring Hanamaru-no-Yu (Oshino Onsen Hanamaru-no-Yu) is located in a quiet residential area of Oita City. It offers a variety of baths, including a free-flowing natural hot spring that is alkaline and known as a 'beauty' spring, outdoor baths, a carbonated spring, and a bedrock spa. The facility has two types of saunas, a hot dry sauna and a steam sauna, with a well-chilled cold plunge bath positioned right next to the sauna room. The outdoor area also features deck chairs for open-air cooling, and since the facility is open until 2:00 AM, you can relax and refresh even late at night.
TypeNatural Hot Spring
A natural hot spring classified as a sodium chloride and bicarbonate spring. It is weakly alkaline with a pH of 8.2 and is reputed as a 'beauty' hot spring that leaves skin smooth.
Sauna TypeDry Sauna
Stove Typegas
Capacity15people
A spacious dry sauna with a large stove and three-tier seating. Humidity is kept at a moderate level, which raises the perceived temperature so you can break a good sweat.
Sauna TypeSteam Sauna
Stove Typeelectric
Capacity5people
A gentle steam sauna that warms the body, recommended for those who prefer a milder option than a dry sauna.
Water Qualitytap
Capacity3people
Located right next to the sauna room for excellent flow, this cold plunge bath features a long, deep tub chilled to about 16℃ to pleasantly tighten your heated body.
Closed Days: None
984 Oshino, Oshino Hanamaru Town, Oita City, Oita Prefecture 870-1121, 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