Hoshi Ryokan is a hotel and hot spring spa in Komatsu, Japan said to have been founded in 718, so coming up on its 1300th anniversary. It has been in the same family for 46 generations. No, the Japanese records going back to 718 are not really good enough to make this certain, but there is some documentation. So why not? Obviously the buildings are a lot newer than that, but they are lovely. Interesting video here.