Sakhalin Island is the largest island in Russia, located in the North Pacific Ocean. It is situated north of Japan and is separated from the mainland by the Nevelskoy Strait. The island has a diverse landscape, featuring mountains, forests, and coastlines, and is known for its rich natural resources, including oil and gas. The island has a population of around 500,000 people, with the largest city being Yuzhno-Sakhalinsk. Sakhalin has a unique cultural heritage, influenced by both Russian and indigenous Ainu peoples. The island's economy relies on fishing, forestry, and energy production, making it an important region for Russia.