After the issue of the Jingu-kaiho coin, all three types of coins, Wado-kaichin, Mannen-tsuho, and Jingu-kaiho, were determined to have an equal value in 779 and they were all together used as the currency thereafter.
神功開宝発行の後、779年（宝亀10年）に和同開珎、万年通宝、神功開宝の3銭は、同一価を持つものとされ、以後通貨として混用された。