Nishiyama Onsen Keiunkan
Hayakawa, Japan
Nishiyama Onsen Keiunkan (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. In 2011, the Keiunkan was recognized by Guinness World Records as the oldest hotel in the world despite the hotel facilities on site being only a few decades old.
Hotel data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).