After Japan opened its country to the world, the Edo bakufu lowered the quality of gold coins to stop the outflow of gold to foreign countries, but because of this, prices rose, the society was in confusion, and European and American merchants also took a hard hit economically.
開国以後、江戸幕府は金の海外流出を食い止めるために金貨の質を落としたが、そのために物価は上昇、社会は混乱し、欧米商人も経済的な打撃を受けた。