Koshu Nishiyama Hot Spring, Keiunkan

Nishiyama Onsen Keiunkan, founded in the Keiun period (705 AD), has been a popular secret hot spring in the mountains of Kai, cherished by many city dwellers, famous generals, and literary figures since ancient times. In 2011, it was certified by Guinness World Records as "the oldest inn with the longest history in the world". Through countless historical moments and over a millennium, the unchanging spirit of hospitality and the essence of Japanese harmony are still passed on to this day, welcoming those who seek an extraordinary experience at Nishiyama Onsen Keiunkan.