Japan officially endorses the objective of a non-nuclear world, but it relies on America’s extended nuclear deterrent, and wants to avoid being subject to nuclear blackmail from North Korea (or China). The Japanese fear that the credibility of American extended deterrence will be weakened if the US decreases its nuclear forces to parity with China.
日本官方赞同实现无核世界的目标，但却依赖于美国的延伸核威慑，希望避开来自北朝鲜（或中国）的核敲诈。日本人害怕如果美国将核力量降低到与中国对等，美国延伸威慑的可信度将会减弱。