* Sea of Japan (called the East Sea by both Koreas and the South China Sea by China): This sea is located to the west of Japan and is bordered by Japan, South Korea, North Korea, and Russia. It is home to many valuable resources, including fish, natural gas, and oil.
* The East China Sea: This sea is located to the south of Japan and is bordered by Japan, China, South Korea, and Taiwan. It is a significant area for fishing, trade, and transportation.
* The Sea of Okhotsk: This sea is located to the north of Japan and is bordered by Japan, Russia, and the Sakhalin Islands. It is known for its cold climate and is a rich habitat for various marine life.