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According to the traditional Japanese calendar, August 13-17 is referred to as Higurashi naku or “Evening cicadas sing”. The loud buzzing of cicadas has become one of the emblematic sounds of summertime in Japan, and can be heard nearly everywhere in the country.
The National Diet Library has more in-depth information about the traditional Japanese calendar, its origins, and the relationship to the modern-day calendar. To learn more, please visit their site: https://www.ndl.go.jp/koyomi/e/