Moneron Island, is a small island off Sakhalin Island. It is a part of the Russian Federation. Moneron has an area of about 30 km2 and a highest point of 429 m. It is approximately 7.2 km long by 5.5 km wide, and is located 41 nmi from Sakhalin's port of Nevelsk and about 30 nmi directly southwest of Sakhalin Island itself at the northeastern end of the Sea of Japan.Wikipedia