Korsakov (Russian: Корса́ков; Japanese: コルサコフ Korusakofu, 大泊 Ōtomari) is a town and the administrative center of Korsakovsky District of Sakhalin Oblast, Russia, located 42 kilometers (26 mi) south from Yuzhno-Sakhalinsk, at the southern end of Sakhalin Island, on the coast of the Salmon Cove in the Aniva Bay. Population: 33,518 (2010 Census preliminary results); 36,652 (2002 Census); 45,096 (1989 Census)..