Private company

Nishiyama Onsen Keiunkan

Hot spring hotel in Hayakawa, Japan

Nishiyama Onsen Keiunkan (Japanese: 西山温泉慶雲館, lit. 'Keiun-era Nishiyama Hot Spring') is an onsen ryokan (Japanese hot spring inn) in Yamanashi Prefecture. Founded in 705 by Fujiwara no 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 2006.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

0705Founded1
Wikipedia-Nisiyama-Onsen-705AD
Photo: Boltor, CC BY-SA 4.0, via Wikimedia Commons3

Nishiyama Onsen Keiunkan (Japanese: 西山温泉慶雲館, lit. 'Keiun-era Nishiyama Hot Spring') is an onsen ryokan (Japanese hot spring inn) in Yamanashi Prefecture. Founded in 705 by Fujiwara no 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 2006.2

Timeline

  1. 0705Founded Founded1

Sources

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