During and after the Kamakura period, shichusen of Sung currency was also actively minted, and it reached its peak during the mid to late Muromachi period (it should be noted, however, that imported Sung currency itself was considered equivalent to shichusen, since it was not money issued by the Japanese imperial court, and therefore could not be considered official money).
鎌倉時代以降は更に宋銭の私鋳銭などが盛んに作られ、室町時代中後期には最盛期を迎えた（なお、宋銭などの渡来銭そのものも当時の日本の朝廷が発行した銭ではないという意味では私鋳銭と同様であった。