Previously, in 1609, the shogunate implemented the following fixed exchange rate: '1 ryo of gold was equal to 50 monme of silver, which was equal to 1 kanmon of Eiraku-tsuho, which was equivalent to 4 kanmon of bitasen.'
これより前の慶長14年（1609年）に幕府は三貨の御定相場として「金一両＝銀五十匁＝永楽通宝一貫文＝鐚銭四貫文」と定めた。