This primary study aimed to accumulate fundamental data for overall consideration of the architectural activities had occurred in KyungSung(京城) of modern times. Basically, 984 articles of general-news column in Chosen-To-Kenchiku(朝鮮と建築) were investigated for analyzing the movements of modern architectures, published in Korea by a party of Japanese engineers(朝鮮建築會) from 1922 to 1945. In briefly, the architectural activities ocurred since early 1920’s, starting from constructing kinds of government offices within downtown areas of the city, and reached to a prosperity of modern architectures by private building contractors in 1930’s, constructing business and merchant buildings, hotels, movie theaters, restaurants, kisaeng houses(演舞場), cafes and so on. In this zenith, Korean owners and architects also participated in these movements as well as Japanese did. Moreover, the urban planning of KyungSung discussed from early 1920’s carried out in 1930’s, and it accelerated these movements for the architectural activities to expand the stage to the areas newly incorporated into the city, developing new residential and industrial dictricts, especially Yeongdeungpo(永登浦) and the neighborhood. This important data of the study will be helpful for succeeding studies to understand the entire aspect of modern architectures in Seoul, and can be advanced to comparative studies with other regions of Korea for the future.