From Dec 12, 2026 to Dec 16, 2026, the corresponding solar term in the Nijūshi Sekki (24 solar terms) is 大雪(Taisetsu), and the corresponding microseason in the Shichijūni Kō (72 microseasons) is 熊蟄穴(Kuma ana ni komoru).

What Is “Kuma ana ni komoru” (熊蟄穴)?

"Kuma Ana ni Komoru" (熊蟄穴, Bears Retreat to Their Dens) is a seasonal term in the traditional Japanese calendar and corresponds to the second microseason of "Taisetsu" (大雪, Major Snow), one of the Nijūshi Sekki (24 solar terms). It generally falls between December 12 and December 16 each year. The Shichijūni Kō (72 microseasons) is an ancient Japanese calendar system that divides the year into 72 finely nuanced seasonal periods, capturing the subtle changes of nature throughout the year. The phrase "Kuma Ana ni Komoru" literally means "bears retreat to their dens," signaling the true beginning of the hibernation season. Before entering hibernation, bears consume large amounts of food and build up sufficient fat reserves, then seek shelter in mountain caves, hollow spaces beneath tree roots, or other protected places. Around this time, bears gradually disappear from view in mountainous regions. Observing nature slipping quietly into a deep winter sleep, people of the past recorded this seasonal transition in the language of the calendar. During this period, the Japanese climate becomes increasingly wintry. Snow begins to accumulate in mountainous areas, while mornings and evenings grow noticeably colder even in the plains. Daylight hours continue to shorten, and as the winter solstice approaches, nature as a whole gradually slows its pace and settles into a season of quiet repose. Although opportunities to encounter bears in everyday life are far less common today, the term "Kuma Ana ni Komoru" can still be seen as carrying a timeless message: just as animals, plants, and the natural world adapt to the arrival of winter, people too may benefit from slowing down, conserving their energy, and embracing a more relaxed rhythm of life. Precisely because this time of year often becomes increasingly busy as the end of the year approaches, this ancient seasonal expression offers a gentle reminder to reconnect with nature's rhythms and take a moment to restore balance to both body and mind.

List of Japan’s 72 Microseasons