Murakami Naojirō was the first professor teaching "History of Nanyang" in the Division of History, the Faculty of Literature and Politics at Taihoku Imperial University. There was no such kind of the History of Nanyang in any imperial universities in Japan, so the setting of the Division of History at Taihoku Imperial University had a characteristic. He was proficient in many foreign languages such as Dutch, Spanish, and Portuguese. He devoted himself to the study of diplomatic history between Japan and European countries over a long period of time. In addition, he studied especially well the Taiwan history of the 16th and 17th centuries, the history of Christianity and the developmental history of Japanese in Nanyang. There were thirteen graduate students in the course of History of Nanyang, four of those topics of thesis were related to the Taiwan history in the 17th centuries, and those who were under the instruction of Murakami. Murakami's achievements in the modern Taiwan history include three dimensions: first, the naming and study of Sinkan Manuscripts. Sinkan was a tribe name of Siraya during the Dutch colonial period, Murakami named those lease contracts which were written in Roman as Sinkan Manuscripts. The contents of those contracts could be broadly divided into three types: sale, pawn, tenancy. Second, editing the historic data of the Palace of Taiwan Governor-General. Its achievements include twenty seven volumes of the main body of The Manuscript of Taiwan Historic Materials, twenty five volumes of the outline, seven volumes of the appendix (include three volumes of The Log of Batavia), fifty nine volumes in total. Third, the study and annotation of Taiwan history during the Dutch and the Spanish colonial period. His academic achievements are extremely rich, and significantly impacts on the development of the modern history of Taiwan.