In March 2020, Hoshino Resorts, which has a reputation for producing high-quality space of hospitality, opened a nationwide hot spring facility brand "KAI" in Yumoto Onsen, Nagato City. The building was designed with the image of a tea house that was also used as the Daimyo's inn, and you can see the decorations unique to Nagato everywhere. Enjoy spending time slowly and leisurely in the "Local Room" decorated with local crafts such as Tokuji Washi paper, Hagi ware, Hagi glass, and ouchi lacquerware, a workshop making traditional craft, Akama Inkstone, a walk around the hot spring town, and the cafe that you can use without staying at the hotel which is the KAI brand's first time trial.