Empress Shotoku, who had brought an end to the Rebellion of FUJIWARA no Nakamaro in 764, printed one million scrolls of Dharanis based on the "Pure Light Great Dharani Sutras" in 770, which took six years, for the purpose of mourning for the souls of departed warriors who were killed in action as well to pray for the protection of the nation.
天平宝字8年（764年）に藤原仲麻呂の乱を平定した称徳天皇は、戦死した将兵の菩提を弔うと共に、鎮護国家を祈念するために、6年の歳月を掛けて宝亀元年（770年）に『無垢浄光大陀羅尼経』に基づいて、陀羅尼を100万巻印刷した。