Japan's Prime Minister, Sanae Takaichi, stated the country "maintains" its non-nuclear principles at a Hiroshima memorial, but avoided explicitly promising their future continuity. This has sparked speculation about a potential review of the long-standing ban on nuclear weapons entering Japan. Her nuanced phrasing, differing from previous prime ministers' commitments, is notable as her government plans to revise key national security documents. Takaichi herself has previously questioned the third principle, which prohibits the introduction of nuclear weapons. She argued that an absolute ban could hinder the effectiveness of the U.S. nuclear umbrella protecting Japan. The Japan Innovation Party also advocates for reviewing this third principle. While existing interpretations allow for flexibility in extreme emergencies, some within the ruling party question the practical benefit of a formal revision given the potential political controversy. Critics also warn that altering the policy without a public U.S. demand could provide China and North Korea with ammunition to portray Japan as militarizing. Allowing U.S. nuclear weapons into Japan could enhance deterrence against North Korea and China, but might also intensify debates concerning extended nuclear deterrence arrangements in the region. The way these principles are addressed in the revised security documents later this year will be crucial in shaping future debates on nuclear deterrence in Northeast Asia.