From Sep 22, 2026 to Sep 26, 2026, the corresponding solar term in the Nijūshi Sekki (24 solar terms) is 秋分(Shuubun), and the corresponding microseason in the Shichijūni Kō (72 microseasons) is 雷乃収声(Kaminari sunawachi koe wo osamu).

What Is “Kaminari sunawachi koe wo osamu” (雷乃収声)?

"Kaminari Sunawachi Koe wo Osamu" (雷乃収声, "Thunder Quiets Its Voice") is one of the Shichijūni Kō (72 microseasons), a traditional Japanese seasonal calendar. Occurring around late September each year, it refers to the time when the sounds of thunder gradually fade away with the end of summer. As sudden downpours and thunderstorms become less frequent and the air grows clearer, people can sense autumn settling in more deeply. The Shichijūni Kō (72 microseasons) are seasonal markers that divide the Nijūshi Sekki (24 solar terms) into even finer segments. They are widely recognized as a reflection of the Japanese tradition of observing subtle changes in nature. Among them, "Kaminari Sunawachi Koe wo Osamu" is especially cherished as a poetic expression symbolizing the transition from summer to autumn. During this period, mornings and evenings become noticeably cooler, and the sounds of insects are heard more clearly. Autumn clouds begin to fill the sky, and rice plants start to ripen in the fields, creating landscapes that evoke the essence of rural Japan. In recent years, the phrase "Kaminari Sunawachi Koe wo Osamu" has also appeared more frequently in haiku, traditional Japanese culture, seasonal greetings, and personal correspondence. For those interested in Japan's seasonal traditions and the Shichijūni Kō (72 microseasons), "Kaminari Sunawachi Koe wo Osamu" offers a fascinating glimpse into the sensitivity and appreciation of nature that have long been an integral part of Japanese life.

List of Japan’s 72 Microseasons