This paper aims to look at Takahashi Toru s Viewpoint on Toegye, focusing on his lecture note of the History of Joseon Confucianism.\nTakahashi s lecture notes are generally consistent with his academic quest for the history of Korean Confucianism under the premise of the Japanese colonial era and regionalism. It is no exaggeration to say that Takahashi s interest in Toegye was absolute. Takahashi Toru s understanding Toegye has the following characteristics.\nFirstly, he exposes that there was the change from induction to deduction, the change in learning and performance(學修法) by Toegye. And he emphasizes the orthodox completion of Joseon Confucianism by Toegye as a framework of Pasa(破邪) and Hyunjeong(顯正). In other words, the building of Toegye’s study as the orthodoxy of Joseon Neo-confucianism was the first task in Takahashi s history of Joseon Confucianism, and as a result the descriptions of scholars before and after Toegye were collected in the process of building orthodox Neo-confucianism by Toegye.\nSecondly, the explanation, which forms Yeungnam School follows Hoeje Lee Eon-jeok, constitutes the regional development of the study of Neo-confucianism along with the Hwadam s Kaeseong School(事功派), while the distinction between the School of SaGong, the School of Taoist Teacher(道學先生), the School of Kyeongje(經濟派) based on the academic characteristics are presented. Soon, it develops into the school of Zuri(主理派), and the the school of Zuki(主氣派), and ultimately the school of Compromise. Such an academic development of Joseon Confucianism history was first established by Takahashi.\nThirdly, it is an evaluation of Toegye s study that faithfully conveys the theory of Chu Hsi and thus succeeded in purifying(醇化) it. This is sometimes cited as an example of proving Joseon s dependence on China, and is also noted as a characteristic of Joseon Confucianism. The quest for the subject matters of the theory of Chu Hsi, which are launched by Toegye, is continued by a later scholar, and this is also an axis of Takahashi s description of the history of Joseon Confucianism.