核かく大たい国こく

noun

major nuclear power

Refers specifically to the five nuclear-weapon states recognized by the NPT (US, Russia, UK, France, China). Used in political and diplomatic contexts.

• 核かく大たい国こくの首しゅ脳のうが軍ぐん縮しゅくについて協きょう議ぎした。

  The leaders of the major nuclear powers discussed disarmament.

• NPTでは、核かく大たい国こくと非ひ核かく保ほ有ゆう国こくの義ぎ務むが異ことなる。

  Under the NPT, the obligations of nuclear-weapon states and non-nuclear-weapon states differ.