The scarcity of ichibu-gin silver coins in cities around the trading port was not improved by issuance of Ansei ichibu-gin silver coins, so HARRIS requested the bakufu to increase mintage of ichibu-gin silver coins in a prompt manner, but they were not emitted so promptly; thus HARRIS requested the bakufu to engrave a mark on foreign silver coins and to make them circulate as 3 bu.
安政一分銀の発行によっても貿易港周辺の市中における一分銀の払底は解消されず、ハリスは幕府に対し一分銀の早急な増鋳を要求したが、発行は思うように進捗せず、洋銀に刻印を打って、三分として通用させるよう要求した。