Once a year the gateway to hell opens and the demons of Hell Valley come out for a procession down the main street, led by the king of the demons, King Enma.

http://noboribetsu-spa.jp/events/jigoku_matsuri/
Gokuraku Street & Hell Valley, Noboribetsu Onsen
60, Noboribetsu Onsen-cho, Noboribetsu-shi, Hokkaido 059-0551