noun
autonomous defense; self-reliant defense
Refers to a nation's independent defense capability without relying on alliances; often used in political and security contexts.
その国は自主防衛の強化を目指している。
That country aims to strengthen its autonomous defense.
専守防衛 is a strictly defensive posture, while 自主防衛 emphasizes independence and self-reliance in defense.
Compound of 自主 (independence, autonomy) and 防衛 (defense).