
The Kuril Islands dispute, also known in Japan as the Northern Territories dispute, is a disagreement between Japan and Russia and also some individuals of the Ainu people over sovereignty of the four southernmost Kuril Islands. The Kuril Islands is a chain of islands that stretch between the Japanese island of Hokkaido at the southern end and the Russian Kamchatka Peninsula at the northern end. The islands separate the Sea of Okhotsk from the Pacific Ocean. The four disputed islands, like other islands in the Kuril chain that are not in dispute, were annexed by the Soviet Union following the Kuril Islands landing operation at the end of World War II. The disputed islands are under Russian administration as the South Kuril District of the Sakhalin Oblast. They are claimed by Japan, which refers to them as its Northern Territories or Southern Chishima, and considers them part of the Nemuro Subprefecture of Hokkaido Prefecture.

Anuchina is an uninhabited island in the Habomai Islands sub-group of the Kuril Islands chain in the south of the Sea of Okhotsk, northwest Pacific Ocean. Named after Dmitry Anuchin, Russian anthropologist, ethnographist and archaeologist. Island's Japanese name is derived from the Ainu language.

The Habomai Islands (Russian: Хабомаи, Japanese: 歯舞群島 or 歯舞諸島 are a group of islets in the southernmost Kuril Islands. They are currently under Russian administration, but together with Iturup, Kunashir, and Shikotan are claimed by Japan.

Iturup is one of the Kuril Islands. It was formerly known as Staten Island. It is the largest and northernmost island in the southern Kurils, ownership of which is disputed by Japan and Russia.

Kunashir Island, possibly meaning Black Island or Grass Island in Ainu, is the southernmost island of the Kuril Islands archipelago. The island is currently under Russian control, though Japan also claims the island.

Nemuro is a subprefecture of Hokkaido Prefecture, Japan. Japan claims the southern parts of the disputed Kuril Islands as part of this subprefecture.
Shikotan, also known as Shpanberg, is an island in the Kurils administered by the Russian Federation as part of Yuzhno-Kurilsky District of Sakhalin Oblast. It is claimed by Japan as the nominal Shikotan District , part of Nemuro Subprefecture of Hokkaido Prefecture.

Yuri (Iurii) is an uninhabited island in the Habomai Islands sub-group of the Kuril Islands chain in the south of the Sea of Okhotsk, northwest Pacific Ocean. Its name is derived from the Ainu language word for cormorant.