This is an icon of the 8th Century mountain wizard En-no-gyoja ("the ascetic from the district of En"), who was a contemporary of Guru Padmasambhava even though there was no communication between Japan and Tibet at that time. He tamed these devils and got them to serve the Dharma. When a friend looked at the faces surrounding En-no-gyoja, he said, "Look! There's Jimmy! And over here, here's Mark! And Matt!"