Hiruma Yojiro was a scout of the Crab Clan stationed at the Castle of Axe. In 1126 he found an aged parchment, which was supposedly written by Kuni Mokuna. It was secured within the castle. Shortly after Zenkai no Oni stormed the fortress, set it ablaze, and killed many of the defenders. The oni was destroyed by one of Yojiro's companions, Hiruma Eikihiro.