Abstract
The author has noticed that there were intense droughts in Japan in the summers of 1883, 1893, 1903, 1913 and 1923. The regular interval of ten years between them atracted his interest. By comparing the curve of drought with that of sunspot activity (fig. in Japanese P. 156) he found that the two droughts in the nineteenth century correspond to the sunspot maxima and the last two droughts to the minima. One in 1903, however, correspond neither maximum nor minimum of the solar activity, but just in the middle of the minimum to the maximum. The author remarks that, as Mr. Yamazawa has already pointed out the sunspot maximum or minimum has tendency to bring some abnormal weather either drought or coolness in summer to this country. But its sense is not necessarily determinate.
