Japan considers acquiring nuclear-powered submarines
Japan's defense minister Shinjiro Koizumi reiterated that Tokyo is not ruling out acquiring nuclear-powered submarines as it revises three key security documents due by year-end. The comment followed an unidentified U.S. Navy official urging consideration of nuclear boats and cited Japan's nuclear energy expertise. Koizumi highlighted pros such as extended patrols and several times the speed of conventional submarines, but noted downsides including being less quiet, expensive and requiring specialized maintenance, repair and operation. Japan currently operates 23 diesel-electric attack submarines, and expert panel recommendations plus coalition policy moves have intensified debate amid China's shift toward an all-nuclear submarine fleet.
Japan is actively considering nuclear-powered submarines as a defense option
Context
Japan is updating three key security documents this year. An expert panel and coalition members pushed for next-generation power and launch systems. China is expanding its nuclear submarine fleet and Japan may respond.
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