Treaty of Peace with Japan (San Francisco Peace Treaty)

The peace settlement was negotiated after Japan's surrender in 1945 and the Allied occupation. The treaty was signed in San Francisco on 8 September 1951. Its formal title is the Treaty of Peace with Japan; it is widely known as the San Francisco Peace Treaty. The United Nations Treaty Series records the treaty text and lists 28 April 1952 as the date it first entered into force for the states that had then ratified it under Article 23.

Article 1 provides that the state of war between Japan and each Allied Power would end on the date the treaty entered into force between Japan and that Allied Power. It also recognizes the full sovereignty of the Japanese people over Japan and its territorial waters. The treaty's entry into force was therefore tied to ratification and was not necessarily simultaneous for every signatory; Article 23 describes the initial conditions and later ratifications.

Article 2 records Japan's renunciation of rights, title and claims to Korea, Formosa (Taiwan) and the Pescadores, the Kurile Islands and certain parts of Sakhalin, among other territories and interests. Article 3 addressed the Ryukyu and other specified Pacific islands by providing for a possible United Nations trusteeship proposal under United States administration in the interim. These clauses set out Japan's treaty renunciations and arrangements; the wording of the treaty does not itself resolve every subsequent question of sovereignty or territorial dispute.

The treaty required Japan to accept obligations associated with Article 2 of the United Nations Charter, including peaceful settlement of disputes and refraining from the threat or use of force contrary to the Charter. Article 5 also acknowledged Japan's inherent right of individual or collective self-defence and its ability to enter into collective security arrangements. Article 6 called for withdrawal of Allied occupation forces within 90 days after entry into force, while permitting foreign forces to remain under separate agreements with Japan.

The treaty addressed reparations and claims in Article 14, recognizing that Japan should pay reparations but also that its resources were insufficient to meet all wartime damage while maintaining a viable economy. It provided for negotiations and certain forms of assistance and settlement rather than an unlimited reparations bill. Other articles dealt with property, commercial relations, fisheries and dispute settlement. The Truman Presidential Library describes the agreement as restoring Japan to sovereign independence and notes that it entered into force on 28 April 1952.

The treaty marked a major legal transition from the post-war occupation to Japan's restored sovereignty and shaped Japan's post-war international relations. The United States and some Allied countries signed it, while not all former Allied states participated in the settlement. The agreement should be read together with contemporaneous bilateral treaties and subsequent diplomatic and legal developments; its provisions remain significant, but they do not alone settle every contested interpretation of post-war territorial arrangements.