Nishiyama Onsen Keiunkan Nishiyama Onsen Keiunkan Nishiyama Onsen Keiunkan (西山温泉慶雲館) is a hot spring hotel in Hayakawa, Yamanashi Prefecture, Japan. Founded in 705 AD by Fujiwara Mahito, it is the oldest hotel and one of the oldest companies in operation. In 2011, the hotel was officially recognised by the Guinness World Records as the oldest hotel in the world. It has been continuously operated by 52 generations of the same family (including adopted heirs) for over 1,300 years. The Keiunkan lies at the foot of the Akaishi Mountains. Since its foundation the hotel has had all its hot water sourced directly from the
Yamashiro Onsen World War II, it developed due it its ease of access to Osaka and Kyoto. Yamashiro Onsen The "onsen" has one hotel and 31 "ryokan." Yamashiro Onsen has a very ancient history, and there are several myths about its foundation. One story attributes it to the wandering Buddhist monk Gyōki in the Nara period who discovered the springs while following an injured crow and seeing it bathe in the hot waters. During the Heian period it developed as part of a Buddhist temple called , dedicated to Yakushi Nyorai, the Buddha of medicine. It was patronised in the Sengoku period