The aim of this study is to clarify the sectional composition of Japanese contemporary houses located on the inclined ground in terms of relations between external and internal composition. External composition is formed by the direction of the approach in contrast to the slope and the ground connection of the building volume. Internal composition is formed by the sectional arrangement of rooms. Then 4 types and 8 patterns of composition are found. Comparing the types and patterns, almost 3 characters are found, those are emphasis of direction of the slope, contrast between the building and the slope, and abstraction of the special quality of the slope.
