Since 1636, bakufu had made zeni-za (an organization in charge of minting coins during the Edo period) across the country cast Eiraku-tsuho (bronze coins struck in the Ming dynasty), whose value was set the same as Bitasen (low quality coins whose surfaces were worn away), though it was good quality coin.
寛永13年（1636年）より幕府は各地銭座に寛永通寳の鋳造を請負わせたが、これは良質の銭貨であったにも拘らず、価値は鐚銭と等価に設定されたのであった。