noun
principle of international cooperation; ideology of international cooperation
Refers to the political or diplomatic stance that emphasizes cooperation among nations, often contrasted with isolationism or unilateralism.
戦後、日本は国際協調主義を外交の基本方針とした。
After the war, Japan made the principle of international cooperation the basic policy of its diplomacy.
Compound of 国際 (international), 協調 (cooperation), and 主義 (principle/ideology).