The Japan Sea is a marginal sea located between the eastern coast of Japan and the Asian mainland, primarily bordered by Russia, North Korea, and South Korea. It covers an area of approximately 1 million square kilometers and is known for its deep waters, with the deepest point reaching about 3,742 meters. The sea plays a significant role in regional climate and marine biodiversity. It is home to various fish species and supports important fisheries. Additionally, the Japan Sea is a vital shipping route, facilitating trade between Japan and other countries in the region.