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1 Sen - Shōwa
| Issuer | Imperial Japanese Mint |
|---|---|
| Year | 1943 |
| Type | Log in to see details |
| Value | Log in to see details |
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| Composition | Log in to see details |
| Weight | Log in to see details |
| Diameter | Log in to see details |
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| In circulation to | 31 December 1953 |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Log in to see details |
| Obverse lettering | 錢 一 (Translation: 1 sen) |
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| Edge | Plain |
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| Additional information |
By 1943, Japan's wartime aluminum allocation had become so constrained that the government was simultaneously reducing coin weights and requisitioning existing metalware from civilian households. This 1-sen piece was struck at just 0.55g — roughly half the weight of its prewar aluminum predecessors — as the military supply chain consumed priority stocks. Production was discontinued entirely the following year, making the 1943 issue the final year of the denomination in circulation.