Furthermore, regarding Kanei Tsuho, iron Tessen coins which were imitations of regular Kanei Tsuho coins and copper coins containing much lead were made for a long time, and these coins are called Bouchusen.
さらに寛永通寳についても公鋳銭を鋳写した鉄銭および鉛分を多く含む銅銭などが古くから密鋳され、彷鋳銭（ぼうちゅうせん）と呼ばれる。