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1 Mon 'Kan'eitsūhō' Small hole reverse ト TO

Issuer Mito Domain (Tokugawa Shogunate)
Year 1864
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In circulation to September 1897
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Obverse description Round cast iron coin with a central square perforation, surrounded by four Chinese characters arranged in cruciform reading order around the hole: 寛 (above), 通 (right), 寶 (left), and 永 (below), together forming the legend 寛永通寶 (Kan'ei Tsūhō, meaning 'Kan'ei currency'). The characters are rendered in a bold, rectilinear script within a plain, slightly raised inner rim framing the square hole. The outer field is flat and unadorned, bounded by a raised circular border.
Obverse script Chinese (Kanji)
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Additional information

Mito Domain occupies an awkward position in the final years of the Tokugawa order — it was the birthplace of the sonnō jōi movement that ultimately destroyed the Shogunate it nominally served. By 1864, Mito was in open internal collapse, torn apart by factional violence between radical and conservative samurai. These iron mon were cast under those conditions, a local emergency issue authorized as domain finances buckled under the strain of the Tengu Party uprising.

The katakana mark ト identifies the specific casting authority within the domain mint. Iron issues from Mito are notably prone to corrosion, and problem-free survivors are scarcer than mintage context alone would suggest.

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