From Feb 4, 2026 to Feb 8, 2026, the corresponding solar term in the Nijūshi Sekki (24 solar terms) is 立春(Rissyun), and the corresponding microseason in the Shichijūni Kō (72 microseasons) is 東風解凍(Harukaze kori wo toku).

What Is “Harukaze kori wo toku” (東風解凍)?

"Harukaze Kōri wo Toku" (東風解凍), literally meaning "the east wind melts the ice," is the first seasonal phase of Japan's Shichijūni Kō (72 microseasons) and corresponds to the first microseason within Risshun (立春, "the beginning of spring") in the Nijūshi Sekki (24 solar terms) calendar. It typically falls between around February 4 and February 8 each year, marking the time when the gentle spring east wind begins to blow and the harsh ice of winter gradually starts to melt. The phrase beautifully captures the subtle transition from winter to spring. The Shichijūni Kō (72 microseasons) originated from an ancient Chinese calendar system that was later adapted to suit Japan's climate and natural environment. The year is divided into roughly five-day periods, each delicately expressing seasonal changes in nature. Among these, "Harukaze Kōri wo Toku" is especially beloved as a microseason that signals the beginning of a new seasonal cycle. The "east wind" here is read Kochi (東風) in Japanese and refers to the wind that heralds spring. Although the cold of winter still lingers, the sunlight gradually becomes softer, and the ice covering rivers and ponds begins to loosen. In nature, plum blossoms start to bloom, allowing people to gently sense the arrival of spring. In recent years, interest in the Shichijūni Kō (72 microseasons) and traditional seasonal expressions has grown significantly. "Harukaze Kōri wo Toku" has attracted attention as a phrase that evokes Japanese culture and the aesthetics of seasonal living. It continues to be cherished today as an expression of Japan's rich sensitivity to the seasons, appearing in haiku, waka poetry, and seasonal greetings in letters.

List of Japan’s 72 Microseasons