Abstract
Fig. l and Fig. 2 show the distribution of heavy rainfall frequency in June and July respectively. In June (Fig. 1), high frequency areas are in the Pacific side of the district. In July (Fig. 2), the frequency decreases very much in the Pacific side, but it increases in the Japan Sea side. In this reprot, heavy rainfalls are defined as rainfalls that amounted over 50 mm per day.
