日清.日露戦後における台湾と樺太の植民地統治機構の構築を通して、原敬が如何に自らの当地への認識や諸政治勢力との競合関係 を考慮し、内地延長主義を形成さらに実現したのかを考察するのが研究目的である。それにより日露戦後の日本の植民地統治政策について分析を加える。台湾の方は、日清戦後に彼は内地延長主義を主張しその具体化を図ろうとしていた。しかし、台湾総督と長州閥が台湾統治を長く主導し、また政党が議会で間接的に支える、という構造を変える力を持っていなかった。その上、日露戦後に自らの勅令による委任立法案を正当化する際に、総督の律令制定権と総督武官専任制の成立を促していた要因である、漢族による武装蜂起を論法として用いたこともあって、内地延長主義は政治の舞台に登場する機が熟さなかった。他方、樺太の方は、日露戦後に陸軍大臣寺内正毅との間に人口希薄や内乱のなさという認識で一致していたことで、妥協の可能性を高めた。結果的に内地法の延長施行が実現され、文官の樺太庁長官任用の可能性が残された。このように、日露戦後の日本にとって、樺太は台湾のような、マジョリティの異民族が武装抵抗する植民地ではなく、人口希薄の開拓地だけでなく、内地延長主義に最適な実験場でもあった。|Through the process of constructing colonial administrations in Taiwan and Karahuto, this paper aims at clarifying the considerations of Hara Takashi in establishing and realizing his extensionism of Japanese Proper. These considerations included the local situations of the colonies and the power struggle of different policy factions. Through this investigation, re-examines the colonia policy of Japan after the Russo-Japanese War. In the case of Taiwan, Hara had proposed extensionism after the end of the Sino-Japanese War. Yet, he could not alter the long-standing structure in Japanese Taiwan rule, which was controlled jointly by the Governor-General's Office of Taiwan, the Choshubatsu, and indirectly supported by the political parties in the Diet. After the Russo-Japanese War, Hara attempted to use the armed resistance of the Han-Chinese as a political weapon to legitimize his proposal of the Cabinet-based ordinance-making authority (敕令). The same reasoning had been used in establishing the law-making authority of the Taiwan Governor-General(總督制定律令權) and the governor-general's appointment from miltary personnel Consequently, extensionism did not come into the political arena. On Karahuto after the Russo-Japanese War, both Hara and Terauchi Masatake, the Minister of the Army, agreed that the locale had only a small population and no rebellion. That raised the chance of political compromise. Consequently, the advocate of extending laws of the Japanese Proper was accepted. Meanwhile, preserved the possibility of a civilian official to head the government of the Karahuto Prefecture. In short, to Japan, the post-Russo-Japanese War Karahuto, unlike Taiwan as a colony of alien races in armed resistance, was a barren land of sparse population for development, and the best experiment laboratory for extensionism