一、日本列岛周围的海底地形日本列岛在西太平洋形成最典型的岛弧、海沟系。在北海道、东北日本弧的前置有千岛、堪察加海沟和日本海沟,在西南日本弧的前置有西南日本海沟(南海舟状海盆),在西南诸岛的前置有琉球海沟。在岛弧的内侧,有鄂霍次克海、日本海和东中国海。 First, the Japanese islands around the seabed terrain The Japanese archipelago in the western Pacific to form the most typical island arc, trench system. In Hokkaido, there are the Thousand Islands, the Kamchatka Trench and the Japanese Trestle in front of the northeastern Japan Arc. There are the Southwest Japan Trench (South China Sea) in front of the Southwest Japan Arc and the Ryukyu Trench in front of the Southwest Islands. Inside the island arc are the Sea of ​​Okhotsk, the Sea of ​​Japan and the East China Sea.