As the Muromachi period began and Eiraku-tsuho (bronze coins struck in the Ming dynasty) minted in China during the Ming Dynasty for trade with Japan were circulated in Japan, Shichusen minted in Konan (Jiangnan) China and Shichusen minted in Japan were gradually mingled together.
室町時代に入り、明が日本との貿易用に鋳造した永楽通宝などが日本国内で流通するようになると、明の江南で作られた私鋳銭や、日本国内で作られた私鋳銭も次第に混入していった。