Usu no Oni

Usu no Oni was an oni of the Shadowlands.

Assaulting Shiro Hiruma
In 314 Shiro Hiruma was besieged. Usu no Oni had gathered an army and marched on the castle. The Crab armies gathered to fight him, but Usu was cunning and the Crab took serious casualties. They became outnumbered and sent runners to inform the Akodo of Hida's imminent failure, and warned them to protect the Emperor at all costs. They dug in, resigned for the worst.

Defeated
A week later, most of the Imperial Legions arrived in Crab lands, led by Emperor Hantei Fujiwa. He placed them, and even himself, under the command of Crab Champion Hida Ichido. With their help, Ichido's armies defeated Oni no Usu and his demons.