Nishiyama Onsen Keiunkan, Hayakawa, Japan Founded in 705 by Fujiwara Mahito, the Japanese resort is recognised by Guinness World Records as the world's oldest continuously running hotel. Keiunkan is located near Mout Fuji in the Kai region of Yamanashi Prefecture.

The title of the world's oldest hotel (which operates with modern 5-star luxury standards) belongs to Nishiyama Onsen Keiunkan in Yamanashi, Japan. It was founded in 705 AD by Fujiwara Mahito and has been operated by the same family for 52 generations. It holds the Guinness World Record for the oldest continuously operating hotel. While it maintains its ancient heritage, it provides a 5-star experience through its "Ryokan" (traditional inn) hospitality, featuring natural hot spring baths (Onsen) and exquisite multi-course kaiseki meals. In the Western world, the Claridge's in London or the Ritz Paris are often cited as the oldest iconic 5-star "Grand Hotels" of the modern era, but in terms of pure longevity, the Japanese inn surpasses them by over a millennium, successfully blending 1,300 years of history with 2026-level luxury.