This study is intended to clarify the architect's vocabulary of Facade design in works of Kiyosi Seike focusing on the relationship between the proportion of windows, fenestration and the external form of elevation. Facades are defined by the composition of sites and buildings, and the expression of windows. The relationship between the proportions is analyzed on the similarity and the repetition of window form and division of window. As the result of classification, 10 types of proportional schemes of elevation are identified, and moreover by analyzing, these schemes are classified into 4 types of facade design. Analyzing the relationship between the date of completion and the proportional schemes, it is clarified that facade design is changed from the totality of proportion to the partiality and the synthesis by the expression of beams and columns.
