Japan’s Nuclear Taboo Is Starting to Crack
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- Takaichi has declined to rule out revising the Three Non-Nuclear Principles in the upcoming national security documents, while maintaining the policy "as a matter of policy" — having previously written in a 2024 edited volume that Japan's nuclear policy was not "realistic" for ensuring U.S. extended deterrence credibility.
- Defense Minister Koizumi Shinjiro, Takaichi's point man for the new security policies, said on a conservative online program that Japan must "discuss and pursue every possible policy option without treating anything as taboo," citing Finland and France's nuclear deterrence efforts.
- Takaichi invoked a 2010 precedent set by DPJ Foreign Minister Okada Katsuya, who stated that in an extreme national security emergency "the government of the day must make the decision with the nation's fate at stake" — an interpretation that could effectively create an exception to the non-introduction principle without formally abandoning it.
- Japanese media has been closely scrutinizing Takaichi's remarks on the Three Non-Nuclear Principles — non-possession, non-production, and non-introduction of nuclear weapons — amid annual August commemorations of the Hiroshima (Aug. 6) and Nagasaki (Aug. 9) atomic bombings.
- Historically, raising nuclear policy was a career-killer: Parliamentary Vice-Minister Nishimura Shingo resigned in 1999 after suggesting Japan should consider becoming a nuclear power, LDP policy chief Nakagawa Shoichi faced intense scrutiny in 2006, and Kyuma Fumio resigned in 2007 after calling the atomic bombings a way to end the war.
- Since the 21st century began, Japan has already crossed multiple postwar security taboos — deploying the SDF to active conflict zones, legitimizing collective self-defense, opening an overseas military base, and greenlighting lethal weapons exports — leaving the nuclear principle among the few remaining.
- The article notes that Takaichi and Koizumi's nuclear remarks have generated little public backlash, a stark contrast with the political consequences faced by predecessors who raised similar questions.
Why it matters: If formalized, a revision of the Three Non-Nuclear Principles would overturn a cornerstone of Japan's postwar pacifist identity on the 80th anniversary of Hiroshima and Nagasaki — and Japan's neighbors, particularly China and North Korea, would weigh any symbolic softening of the non-introduction pledge against the backdrop of Takaichi's parallel moves to raise defense spending.
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