A cease fire implies that hostilities can be restarted. By accepting and signing the unconditional instrument of surrender dictated by the Allied Powers, the state of war between Japan and the Allied Powers (including the former Soviet Union) ceased at that moment. The former Soviet Union refused to sign the San Francisco Treaty in 1951 leaving Soviet-Japanese relations in limbo. Although a peace treaty has yet to be signed, diplomatic relations were re-established in October 1956 with the signing of a joint declaration which had many of the characteristics of a peace treaty if not in name. Negotiations are still continuing. The primary sticking point is the territorial dispute over the four Kurile Islands and South Sakhalin. However, there are other a host of other issues such as Russia's failure to provide Japan with a full accounting of the fate of all Japanese prisoners of war held by the Soviets at the end of World War II.