1 Mon 'Genyūtsūhō' Seal script, 'Kanōde Genyū'

Cast — not struck — at a private foundry operated by the Kanō family in the early Edo period, this piece belongs to a category of commercial coinage tolerated rather than officially sanctioned by the Tokugawa shogunate. The bakufu had not yet consolidated monetary policy tightly enough to suppress regional and merchant-family casting operations, and the Kanō foundry exploited that window for three decades.

The wide DHJ reference range reflects genuine die and mold variation across the production run — minor differences in calligraphic execution and casting quality distinguish individual types within the series.