Chirinkotan

Volcanic island in the Kurile island chain

Chirinkotan (Чиринкотан; Japanese 知林古丹島; Chirinkotan tō) is an uninhabited volcanic island located in the centre of the Kuril Islands chain in the Sea of Okhotsk in the northwest Pacific Ocean. Its name is derived from the Ainu language for "mudslide". It is located west of Ekarma, its nearest neighbor.

Chirinkotan is at the far end of a volcanic chain extending nearly 50 km west of the central part of the main Kuril Islands arc. The island is the top of a partially submerged stratovolcano rising approximately from the floor of the Sea of Okhotsk, and is roughly circular with an area of The island's highest point ("Masaochi" in Ainu) is high, and is still an active volcano with major eruptions recorded in 1760, 1884, 1900, 1979, 1986, 2004, and 2013. Reports of a 1955 eruption are unconfirmed. The caldera is approximately wide, with a depth of , and is breached on its south east side. The shores of the island are steep cliffs, making landing by small boat impossible.

Chirinkotan has had no permanent habitation. Claimed by the Empire of Russia, sovereignty was passed to the Empire of Japan per the Treaty of Saint Petersburg along with the rest of the Kuril Islands. The island was formerly administered as part of Shumushu District of Nemuro Subprefecture of Hokkaidō. 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.

In the spring and early summer crested, whiskered, and parakeet auklet nest on the island.