Ryokan (inn) Ryokan (inn) A is a type of traditional Japanese inn that has existed since the eighth century A.D. during the Keiun period, in which the oldest hotel in the world, Nishiyama Onsen Keiunkan, was created in 705 A.D. Another old ryokan called Hōshi Ryokan was founded in 718 A.D and was also known as the world's second oldest hotel. Such inns also served travelers along Japan's highways. They typically feature "tatami"-matted rooms, communal baths, and other public areas where visitors may wear yukata and talk with the owner. Ryokan are difficult to find in Tokyo and other large cities because
Onsen found in some onsens with poor sanitation. Revelations of poor sanitary practices at some onsens have led to improved regulation by hot-spring communities to maintain their reputation. There have been reports of infectious disease found in hot bodies of water worldwide, such as various "Naegleria" species. While studies have found the presence of "Naegleria" in hot spring waters, the worrisome "Naegleria fowleri" amoeba has not been identified. Nevertheless, fewer than five cases have been seen historically in Japan, although not conclusively linked to onsen exposure. Many onsens display notices reminding anyone with open cuts, sores, or lesions not to bathe.