七十年代初,日本列岛附近被划分为板块边界后,日本列岛属于欧亚板块,东北日本下的太平洋板块,菲宾海板块俯冲于西南日本下的板块边界的基本图式,一般能被人们接受,有关这种情况并不认为发生了大变化。但是,进入八十年代,出现了关于日本列岛板块边界分布的新学说。这种学说说明日本海正在向东北日本下俯冲。它强调位于北海道中轴部的北 In the early 1970s, after the Japanese islands were divided into plate boundaries, the Japanese archipelago belongs to the Eurasia Plate, the Pacific Plate in Northeast Japan and the basic pattern of the Philippine Sea plate subducting to the plate boundary under Southwest Japan, Accepted, this situation does not think that great changes have taken place. However, in the 1980s, a new doctrine emerged about the distribution of the boundaries of Japan’s plate islands. This doctrine shows that the sea of ​​Japan is diving toward northeast Japan. It emphasizes the north of Hokkaido’s central axis