1 Mon 'Gennatsūhō' Bansen, number on reverse

Obverse description	Cast bronze cash-type coin featuring the four-character legend 元和通寶 (Genna Tsūhō) arranged in cruciform fashion around a central square hole, reading top-bottom-right-left in the traditional East Asian manner. The characters are rendered in a bold, regular-script (kaishu) style with well-defined raised strokes against a flat field. A raised rim encircles the entire obverse, and the square perforation is framed by a raised inner border. The overall design follows the classical Chinese cash coin format adopted for Japanese Tokugawa-period issues.
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Reverse script	Chinese
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Additional information	The Genna Tsūhō was among the earliest cast coinages authorized under the consolidated Tokugawa monetary system, issued shortly after the Osaka campaigns eliminated the last serious rival to shogunal authority. Most examples circulating today show the characteristic porosity of sand-cast bronze, a direct artifact of the bansen workshop method — small trays casting dozens of coins simultaneously from a single pour. The numbered reverse identifies the specific casting house responsible for production, a quality-control measure the shogunate imposed to track accountability across a decentralized minting network.