1 Mon 'Jōkyōtsūhō'

The Jōkyō Tsūhō was introduced in 1684 as part of a broader Tokugawa monetary reform under the fifth shogun Tsunayoshi, intended to standardize the chaotic mix of domestic and imported Chinese cash coins that had circulated in Japan for decades. Imported Kangxi-era Chinese coins and older domestic issues had created persistent quality inconsistencies, and the bakufu's answer was tighter control over copper coinage production at the Nagasaki and Edo mints.

Production was relatively short-lived. Within a generation, the Genbun monetary reforms of the 1730s shifted focus, and the Jōkyō Tsūhō was phased out in favor of successor types.