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1 Sen - Shōwa
| Issuer | Imperial Japanese Mint |
|---|---|
| Year | 1938-1940 |
| Type | Log in to see details |
| Value | Log in to see details |
| Currency | Log in to see details |
| Composition | Aluminium |
| Weight | Log in to see details |
| Diameter | Log in to see details |
| Thickness | Log in to see details |
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| Obverse description | Central field features the denomination characters 一錢 (1 Sen) within an ornate floral wreath design. A sixteen-petalled imperial chrysanthemum (the Emperor's seal) is prominently displayed at the top of the design, while a paulownia flower (the government seal of Japan) appears at the bottom. The overall composition is enclosed within a beaded inner border. |
|---|---|
| Obverse script | Log in to see details |
| Obverse lettering | Log in to see details |
| Reverse description | Log in to see details |
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| Edge | Plain |
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| Additional information |
Japan's shift to aluminium for this denomination was a direct consequence of military demand stripping the country's copper and bronze reserves ahead of full-scale war in China. The Army and Navy had effective veto power over raw material allocation by the late 1930s, and the coinage budget got what was left.
Production ended in 1940 when even aluminium was deemed too strategically valuable for fractional coinage, leading to the ceramic and fibre issues that followed wartime triage.