"三线论"与日本的"大陆开拓"

“Three-Line Theory”and Japanese“Continental Extension”

明治维新以来,日本急速膨胀的社会生产力与其先天的岛国属性之间形成了鲜明的矛盾,由此催生了一批鼓吹通过殖民扩张对东亚进行"大陆开拓"的理论.在日本的一系列对外开拓理论中,山县有朋提出的"利益线"理论、半泽玉成等人提出的"国防线"理论和松冈洋右提出的"生命线"理论是较为典型的代表.这"三线论"一脉相承,从不同角度为日本对东亚大陆的殖民开拓提供了理论依据.本文将"利益线"、"国防线"和"生命线"这三种理论作为研究对象,结合历史背景,从地缘政治学的角度分析其成因、内涵及影响,旨在揭示三者之间的逻辑演进顺序,厘清近代以来日本对外扩张思想的整体脉络.

Since the Meiji Restoration,the sharp contradiction between Japan’s rapidly expanding social productivity and its innate island-state attributes has spawned a number of theories that advocated“continental extension”in East Asia through colonial expansion.Among a series of Japan’s development theories,the“interest line”theory proposed by Yamagata,the“defense line”theory proposed by Hanzawa,and the“lifeline”theory proposed by Matsuoka are typical examples.This“three-line theory”follows the same line,and provides a theoretical basis for Japan’s colonization of the East Asian continent from different perspectives.In this article,the three theories of“interest line theory”,“defense line theory”and“lifeline theory”are taken as research objects.Combining with historical background,this paper analyzes its causes,connotations and influences from the perspective of geopolitics.The sequence of logical evolution between them helps us to clarify the overall mentality of Japan’s external expansion since modern times.