1 Mon 'Eirakutsūhō' Cast gold

The Eiraku Tsūhō (永楽通宝) was originally a Chinese cash coin of the Yongle Emperor, struck from 1408 onward and imported into Japan in vast quantities. By the Sengoku period it had become the dominant trade currency in central Japan, particularly favored by Oda Nobunaga, who adopted it as his personal monetary standard and emblazoned it on his battle flag. This gold cast version dates to the years of Toyotomi Hideyoshi's consolidation of power, when regional warlords still issued coins drawing on that same symbolic currency to claim legitimacy Nobunaga had established.

Hideyoshi would soon replace the Eiraku system wholesale with his own gold koban standard — making issues like this transitional relics of a monetary order already being dismantled at the moment of striking.