Writing books such as "Seiyoshi Kowa" (A Lecture on Western World History), "Furansu Daikakumeishi" (History of the Great French Revolution)" and "Naporeon Jidaishi" (History of Napoleon Era), Mitsukuri made a remarkable contribution to the community of historians to let them recognize the significance of the study of Western world history.
『西洋史講話』や『仏蘭西大革命史』、『ナポレオン時代史』などを著しながら、西洋史研究の重要性を歴史学界に認めさせた功績は大きい。