Sengokuhara Onsen is a hot spring resort area located on grass-covered plains about 700 meters above sea level. Use of the hot springs in the area for bathing began in 1736. Currently, every hotel here uses hot spring water from Owakudani or from Ubako. It was developed as a Western-style resort area during the 20th century, and it has more nature-filled areas compared with other regions in Hakone. In Sengokuhara, there is also a botanical garden, a museum and golf courses in harmony with the existing nature.