Military Law in Japan

Tue, 07 Jul 2026 00:00:00 +0000

Constitutional Framework: Article 9

Japan’s military forces are fundamentally shaped by Article 9 of the Constitution (1947), which renounces war and prohibits maintaining “war potential.” Drafted under the Allied Occupation and never amended, Article 9 has been subject to continuous constitutional debate since the establishment of the Self-Defense Forces (SDF) in 1954. The original government interpretation, articulated by the Cabinet Legislation Bureau, held that Article 9 prohibits “war potential” but permits the minimum necessary force for self-defence. This distinction — between forbidden “war potential” and permitted “self-defence capability” — has been criticised as semantically untenable but has provided the SDF’s doctrinal foundation for over seven decades.

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Military Law in Japan

Constitutional Framework: Article 9