Kokonoe-cho, Kusu-gun, Oita
- KAI Aso is located on the southern island of Kyushu, surrounded by lush mountains of a national park. The mineral-rich hot springs of Mt. Aso, a caldera volcano, fill the outdoor tubs that grace every secluded villa. After you soak, take in panoramic views of the
magnificent five peaks while savoring the local Kyushu cuisine.