noun
nuclear arms race
Refers to the competitive buildup of nuclear weapons between nations.
冷戦時代、米ソ間で核軍拡競争が激化した。
During the Cold War, the nuclear arms race between the US and the Soviet Union intensified.
Compound of 核 (kaku, 'nuclear'), 軍拡 (gunkaku, 'military expansion'), and 競争 (kyōsō, 'competition').