According to "Muryoju-kyo Bussetu Muryoju-kyo Sutra," he willingly stepped down from the status of Buddha to Bosatsu and practiced ascetic training for the relief of all the living things under Lokeshvararaja Buddha, with the name Dharmakara.
『無量寿経仏説無量寿経』によると、一切の衆生救済のために自ら仏の位を降りて菩薩となり、世自在王仏の元で法蔵と名乗り修行をした。