원래 소수의 러시아인이 거주하던 곳이었지만 러일전쟁 이후 일본인들이 들어와 섬 전체를 요새화하고 지하화한 것으로 알려지고 있다.
It was originally inhabited by a small number of Russians, but it is known that Japanese came in after the Russia-Japanese War to fortify and underground the entire island.