Nishiyama Onsen Keiunkan (西山温泉慶雲館)[1] is an onsen—a Japanese hot spring spa—in the Yamanashi Prefecture. Founded in 705 by Fujiwara Mahito, it is a prime example of shinise ("long-established business") and perhaps the oldest independent company in operation following the acquisition of construction company Kongō Gumi in 2006. In 2011, … [Read more...] about Nishiyama Onsen Keiunkan