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## Overview Japan is undergoing a historic transformation of its post-WWII pacifist security framework, driven by Prime Minister Sanae Takaichi's government and accelerated by growing doubts about US reliability as a security guarantor. ## Arms Export Policy Changes The Yomiuri newspaper reported that revisions to Japan's Three Principles on the Transfer of Defence Equipment and Technology were set for cabinet approval (SCMP, April 2026). Analysts say the changes will strengthen Japan's domestic defence industry, spur innovation, deepen security ties with allies, and reduce Tokyo's reliance on Washington at a time when the US is "increasingly seen as a less reliable partner" (SCMP, April 2026). ## Constitutional Revision PM Takaichi is pursuing the first-ever revision of Japan's post-WWII pacifist constitution (Article 9) (SCMP, April 2026). The LDP secured a historic two-thirds supermajority in the lower house in February 2026 elections, crossing the threshold needed to pass amendments without coalition support (SCMP, April 2026). Observers assess this is "likely to be welcomed in Washington and condemned in Beijing" (SCMP, April 2026). ## Strategic Context - Japan is simultaneously deepening NATO cooperation and pursuing Southeast Asia trust-building amid its military expansion - The moves follow Japan's 2022–2024 defense spending escalation toward the NATO 2% GDP target - A Japanese physical AI joint venture (SoftBank, Sony, NEC, Honda) signals parallel civilian-military technology integration - The US-Iran war context has intensified pressure on Japan to reduce single-partner dependency ## Legal & Policy Implications Constitutional amendment requires approval by two-thirds of both Diet chambers, followed by a public referendum. The pacifist Article 9 has never been amended since 1947. Business and legal practitioners should monitor export control liberalization for defense technology licensing opportunities and compliance obligations. ## Key Figures - **Sanae Takaichi**: Prime Minister, LDP, architect of constitutional revision push - LDP supermajority in lower house as of February 2026 ## Connections Related to Japan-NATO security cooperation deepening, Japan-US investment strategy tensions, and broader Indo-Pacific rearmament trends.