Developing Story
Japan's Nuclear-Powered Submarine Debate
Japanese PM Sanae Takaichi is considering acquiring nuclear-powered submarines, breaking a long-standing taboo, as Tokyo revises its security strategy amid rising tensions with China — a move reportedly dividing the ruling coalition.
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## Overview
Japanese Prime Minister Sanae Takaichi is weighing a historically taboo move — acquiring nuclear-powered submarines for the Maritime Self-Defence Force — amid rising tensions with China and Beijing's expanding naval power across the Pacific (SCMP, October 25). Takaichi told parliament on October 14 that Japan 'will seriously consider [the possibility] in a concrete and realistic manner' (SCMP, October 25). The proposal is reportedly dividing Japan's ruling coalition as Tokyo prepares to revise its core security documents by year's end (SCMP, October 25).
## Why it matters
This is a strategically significant development in Japan's defense posture and regional security balance, with implications for US-Japan alliance planning, nuclear non-proliferation norms, and China-Japan tensions.