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    Japan Has Considered Nuclear-Powered Submarines Since 1958. Why Has It Never Built One?

    The Diplomat
    October 20, 2026
    via The Diplomat

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    Japan Has Considered Nuclear-Powered Submarines Since 1958. Why Has It Never Built One?

    From a 1958 design study to reported approaches to the U.S. Navy, Japan has repeatedly examined nuclear-powered submarines without making an acquisition decision.

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