|Address||Honyabakeimachi Sogi, Nakatsu City, Oita Prefecture|
|Contact||Nakatsu City, Yabakei Office|
Found at the foot of the Kyoshuho Ridge along the Yamakuni River, Aonodomon is a tunnel dug by Buddhist monk Zenkai. He spent 30 years of his life digging this tunnel by using just a chisel and a hammer. Known as an autumn foliage scenic spot, Aonodomon brings a ton of visitors during fall season.