It is believed that the process to manufacture black gunpowder was introduced to Japan during the period from the 13th century to the 14th century through trades with Konan (Jiangnan) of China and Korea.
その後、中国の江南や朝鮮との交易によって13から14世紀の日本にも黒色火薬の製法が伝来したと考えられている。