Russia and Japan's Islands Dispute.

Japan and Russia still haven't signed a peace treaty to end World War II due to the Kuril Islands dispute.

The Islands in dispute are: Etorofu Island, Kunashiri Island, Shikotan Island, Habomai Islands.

The San Francisco Peace Treaty, signed between the Allies and Japan in 1951, states that Japan must give up "all right, title and claim to the Kuril Islands", but it also does not recognize the Soviet Union's sovereignty over them.

During talks leading to the joint declaration, the Soviet Union offered Japan the two smaller islands of Shikotan and the Habomai Islands in exchange for Japan renouncing all claims to the two bigger islands of Iturup and Kunashir, but Japan refused the offer.

This disagreement between the two-island offer made by the Soviet Union and Japan's demand of regaining two bigger islands as well became the cornerstone for continuation of the dispute into the present day.