Japan's Ruling Coalition Splits Over Nuclear Posture in Security Review

As Japan revises its core national security documents, a divide has opened within the ruling bloc over nuclear policy. The junior coalition partner, the Japan Innovation Party (JIP), is pushing for what it calls a realistic review of allowing nuclear weapons into the country, while the larger Liberal Democratic Party (LDP) is focused on strengthening the extended deterrence the United States provides, The Japan Times reported.

The two parties did not unify their recommendations, and differences remain over budget, nuclear questions, and the possibility of nuclear-powered submarines, according to Jiji Press. The disagreement reflects a wider debate in Tokyo about how far to move from the country's long-standing non-nuclear principles as the regional threat environment changes.

The discussion would have been politically unthinkable in Japan a decade ago. That it is now part of a formal security review shows how much the strategic calculus in Northeast Asia has shifted.