Have you heard of Sakhalin Island? 사할린 섬을 아시나요?

Have you heard of Sakhalin Island? Around 40,000 people in this Rusian island are Koreans. During the Japanese colonial period thousands of Koreans where forced to move to Sakhalin as forced laborers. At that time the Japanese island was called Karafuto. At the end of WWII Russia took control over the island and all of the Japanese went back to Japan. But what about the Koreans? Japan said they had no obligation to take care of Koreans in Sakhalin, Russia was not interested in them either, and Korea was i