The Sea of Japan is a marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and Russia. It has almost no tides due to its nearly complete enclosure from the Pacific Ocean. The sea is divided into three major basins: the Yamato Basin, the Japan Basin, and the Tsushima Basin. It is a vital area for fishing, particularly for squid and crab. A major geographical and political point of contention is the sea's name; while 'Sea of Japan' is the international standard, South Korea refers to it as the 'East Sea' and North Korea as the 'East Sea of Korea.' This dispute is linked to historical sensitivities regarding Japanese colonization. The sea also contains the Liancourt Rocks (Dokdo/Takeshima), which are the subject of a long-standing territorial dispute between South Korea and Japan.