Abstract
It is well known that the orographic rainfall in Japan is strongly influenced according to their path of cyclones. Under simplified assumptions as (1) the Japanese archipelagoes can be represented by a straight barrier, and (2) the intensities of rainfall are proportional to the quantity of air flow ascending the straight barrier forced by the cyclonic wind system, the close relationship between the path of cyclones and the orographic rainfall has been deduced by quite kinematic way. The intensity of rainfall has been estimated for the two representative cases, i.e., (1) a depression advanced along the Japanese archipelagoes, and (2) a depression crossed the Japanese archipelagoes perpendicularly.
