Makanrushi (Russian: Маканруши; Japanese 磨勘留島; Makanru-tō) is an uninhabited volcanic island located near the northern end of the Kuril Islands chain in the Sea of Okhotsk in the northwest Pacific Ocean.

Makanrushi is roughly rectangular, with an area of 49 square kilometres (19 sq mi)[1] The island consists of a dormant or extinct stratovolcano, Pik Mitaka -(Russian: влк.Митака; Japanese 三高山; Mitakayama), which rises to 1,169 m (3,835 ft) above sea level.

The island has steep cliff sides and no sandy beaches, making landing very difficult and dangerous even in calm weather.

Subsequently, claimed by the Empire of Russia, sovereignty initially passed to Russia under the terms of the Treaty of Shimoda, but was returned to the Empire of Japan per the Treaty of Saint Petersburg (1875) along with the rest of the Kuril islands.

After World War II, the island came under the control of the Soviet Union, and is now administered as part of the Sakhalin Oblast of the Russian Federation.