This study aims to survey the internal moment of emerging modern Kokugo(國語)-Education in East Asia, and analyze the historical background and the situation of Kokugo-Education in Japan, and investigate the influence of it to the Kokugo-Education in the colonialized Korea in the half of 20th Century. Strictly speaking, by comparing two Kokugo-Educations I tried to enlighten the real aspect of Japanese Language Education in the name of Kokugo-Education in the colonialized Korea. This paper is not more than an entrance of such a long-term study. In this paper I clarified the modernity and coloniality of Hutsuugakkou Kokugo-Tokuhon(普通學校國語讀本), so in the next stage, I wish to compare the other Kokugo-Education text of different period and find out the aspect of modernity and coloniality: one including the concern on the childhood, education system, and group life, the other including the recognition of discrimination on Chosun Peninsula as compared with the Japanese mainland, and of exploiting the colonialized Chosun province and inspiring the national consciousness. I wish the next paper concrete and precise.