Yumura Hot Spring Village (Yumura Hot Spring Inn Cooperative Association)

Yumura Onsen is commonly referred to as 'Shingen's hidden hot spring', but its history is older than that of Shingen. It was the location of a manor called Shima-sho (land privately owned by the imperial family, nobility and temples and shrines, which became their source of revenue) around the end of the Heian period (1080-1180), and is recorded in the Muromachi period (1336-1573), In records from the Muromachi period (1336-1573), the name of the Yamagata clan (vassals of the Takeda family) can be seen as the landowner (lord) of Shima Sho.
According to tradition, local people who noticed that wounded eagles often flew over the area discovered that there was a hot spring gushing out in Kayahara, or that Kobo-Daishi, who made an itinerant journey around the country, prayed for the advent of Jizo Bosatsu and dug into the ground with a tin can to heal people from various illnesses, and found hot spring water himself, It is not clear.
The oldest record currently known is that Shibayaken Munenaga, a renga master active from the end of the Muromachi period to the beginning of the Warring States period, visited Kai Province in 1511 and made a hot-spring cure at this site.
Yumura Onsen was also known at this time as Shima no Yu (hot water of Shima), derived from the name of the manor, or Yunoshima (Shima).
The hot springs known as 'Shingen's hidden hot springs' are reported in Yamanashi, Nagano, Shizuoka and Gifu, but of these, Yumura Onsen is the only one where there is a definite record of Shingen, Katsuyori and their son having a hot-spring cure.
Yumura Onsen has a gush of slightly alkaline spring water with an average temperature of about 40 °C and a flow of about 900 litres per minute, including that used in hot-spring hospitals and nursing homes.