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Oshima Subprefecture is an administrative subdivision of Tokyo, Japan. It includes the following towns and villages on islands in the Izu Islands:
- Oshima (town on Izu Oshima)
- Toshima (village on Toshima)
- Niijima (village on Niijima and Shikinejima)
- Kozushima (village on Kozushima and Zenisu)
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