●Treaty of Shimoda　1855	●Treaty of Saint Petersburg 1875	●Treaty of Portsmouth　1905	●Treaty of San Francisco　1951
Japanese territory Russian territory Undecided area The treaty confirmed the boundaries, drawing the boundary between the islands of Iturup (Etorofu) and Urup (Uruppu). About Sakhalin, the border was not decided.	Japanese territory Russian territory Japan renounced Sakhalin. Japan obtained the Kuril Islands instead.	Japanese territory Russian territory As a result of Russo-Japanese War, Japan received the southern part of Sakhalin starting at a latitude of 50 degrees north.	Japanese territory Russian territory Islands Japan renounced Islands Russia occupies illegally Japan renounced the Kuril Islands and south Sakhalin. But Japan did not renounce the Northern Territories.

On February 7, 1855, Japan and Russia signed the Treaty of Commerce, Navigation and Delimitation, which confirmed the boundary between the islands of Etorofu and Uruppu. The Northern Territories, consisting of four islands of Etorofu, Kunashiri, Shikotan and Habomai, are an inherent part of the territory of Japan, which have never been held by foreign countries. However, the Northern Territories have been under illegal occupation by the Soviet Union, and then Russia, since the Soviet Union occupied them in 1945.

The Government of Japan has energetically been continuing negotiations with Russia based on its basic policy of resolving the issue of the attribution of the four Northern Islands and concluding a peace treaty with Russia.