1 Mon 'Eirakutsūhō' Cast silver, Reverse Omodaka

Obverse description	Log in to see details
Obverse script	Log in to see details
Obverse lettering	Log in to see details
Reverse description	Central square perforation positioned in the lower half of the field, surmounted by a stylized relief depiction of the omodaka (Sagittaria trifolia, arrowhead plant), rendered with a prominent trilobate arrowhead-shaped leaf rising centrally and two smaller rounded leaves flanking it at the base, all emerging from a horizontal platform above the square hole. The field is otherwise plain, framed by a raised outer rim, with the naturalistic botanical motif executed with fine cast detail characteristic of late Sengoku-period silver coinage.
Reverse script	Log in to see details
Reverse lettering	Log in to see details
Edge	Plain
Mint	Log in to see details
Mintage	Log in to see details
Additional information	The Eiraku Tsūhō was originally a Chinese cash coin of the Yongle Emperor, imported into Japan in vast quantities from the early 15th century and so thoroughly adopted that Japanese authorities began casting domestic imitations to meet demand. By the Sengoku period, silver cast versions — known as gin-sen — circulated as a distinctly Japanese adaptation, with certain warlords effectively authorizing their own issues. The omodaka (arrowhead plant) reverse mark on this piece is a domain or workshop identifier, though attribution to a specific issuer remains contested among specialists.