Yomi is ruled over by Izanami no Mikoto, the Grand Deity of Yomi ("Yomotsu-Ōkami" 黄泉大神). According to Kojiki. The entrance to Yomi was blocked by Izanagi when he returned to Earth, using a great boulder ("Chibiki-no-Iwa" 千引の岩) at the base of the slope that leads to Yomi ("Yomotsu Hirasaka" 黄泉平坂).