China has recently criticized Japan over its non-nuclear principles, sparking diplomatic tensions between the two nations. The criticism is directed at Japan's three non-nuclear principles, a policy that renounces the possession, production, and introduction of nuclear weapons. The specific reasons for China's criticism and its implications on bilateral relations are yet to be explored in depth.

Japan's three non-nuclear principles are deeply rooted in its post-WWII society and policies, following the tragedies of Hiroshima and Nagasaki. The public has generally supported these principles, and any attack on them is seen as a direct criticism of Japan's peaceful stance in international affairs.

Unlike Japan, the US and the EU possess nuclear weapons as part of their defense policies, thus criticism from other countries over such issues is typically around disarmament talks, rather than the principles themselves.