From Nov 12, 2026 to Nov 16, 2026, the corresponding solar term in the Nijūshi Sekki (24 solar terms) is 立冬(Rittou), and the corresponding microseason in the Shichijūni Kō (72 microseasons) is 地始凍(Chi hajimete koru).

What Is “Chi hajimete koru” (地始凍)?

"Chi Hajimete Kōru (地始凍, Ground Begins to Freeze)" is one of the Shichijūni Kō (72 microseasons) that falls within "Rittō (立冬, Beginning of Winter)", a seasonal period in the Nijūshi Sekki (24 solar terms)". It typically occurs from around November 12 to November 16 each year and describes the time when the earth grows cold and begins to freeze. The "Shichijūni Kō (72 microseasons)" is a traditional Japanese calendar system that divides the year into 72 finely observed seasonal phases. "Chi Hajimete Kōru" is the first of the three microseasons that make up "Rittō (Beginning of Winter)". Originally introduced from ancient China, this calendar evolved uniquely in Japan to reflect the country's climate and landscape, capturing the subtle transitions of nature with remarkable sensitivity. During "Chi Hajimete Kōru", the chill of early morning and evening becomes noticeably sharper, and frost begins to appear in more regions. The sight of the ground lightly coated with a thin layer of ice offers a tangible reminder that winter is on its way. In rural communities, this period traditionally marked the start of serious winter preparations, including protecting crops from frost and tending fields before the colder months set in. Even in modern life, "Chi Hajimete Kōru" serves as a reminder to pay closer attention to our health as temperatures drop. Dressing in layers and enjoying warm, nourishing meals can help the body adapt to the sudden cold. Seasonal foods such as root vegetables and hot-pot dishes are especially well suited to warming the body from within. By becoming aware of the "Shichijūni Kō (72 microseasons)", we can develop a deeper appreciation for the subtle changes of the seasons in our daily lives. "Chi Hajimete Kōru" is a cherished seasonal expression that reflects the Japanese people's long-standing connection with nature and gently announces the arrival of winter.

List of Japan’s 72 Microseasons