関東州租借地における漁業構造の変貌 ―1920 年〜30 年代の機船底曳網漁業を基軸に―

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After the Russo-Japanese War, Japan acquired the leasehold of the “Kanto Region”, which encouraged the process of fishery activities. This research discusses the fishery characteristics and the transformation of fishery structure in the Kanto Region focusing on the dragnet fishery in the 1920s –1930s. The research confirms the historical facts in the following three aspects: 1) the transformation of fishery structure in regulation and policy, number of households and persons, fishing-boat, amount and species of fish catch; 2) the transformation of the regulation and policy from promotion to restrict about the dragnet fishery; 3) expanded production of the dragnet fishery and promotion of the high horsepower management.