朔風 (sakufū), the wind this kō names, is the cold north wind — 朔 ordinarily means the new moon or the first day of a lunar month, and its extension to "north" comes from an old Chinese compass association rather than anything to do with wind or weather directly. By now this wind has a job: stripping whatever color November left on the trees, sweeping the last leaves down in drifts. When this same north wind crosses the mountains from the Sea of Japan side, it drops its moisture as heavy snow on that coast, then arrives on the Pacific side already wrung dry — a cold, hard, transparent wind known regionally as からっ風 (karakkaze).
Fallen leaves aren't only debris in the traditional view — they're 望み葉 (nozomiba, "hope leaves"), breaking down in the soil over winter into exactly the nutrients the same ground will need to support new growth in spring. The wind clearing the branches now is, in that reading, already doing spring's preparatory work.
Continuing to richen toward its winter peak; look for 寒鰤 (kanburi) on menus in the coming weeks for the top of the season.
In good season now; its milt (白子, shirako) is a distinct winter delicacy, creamy and rich when lightly grilled or added to a hot pot.
Late-season varieties are excellent now, dense and sweet after the season's first real cold.
In full season — this is also roughly when yuzu baths (柚子湯) start appearing at public baths and homes, though the custom properly belongs to the winter solstice a few weeks ahead.
Storage sweet potatoes reach peak sweetness now, weeks after harvest, as their starches continue converting to sugar in storage — exactly why roadside 石焼き芋 carts appear right around this kō.
At full sweetness, unavoidable in every nabe pot from here through deep winter.
Good simply grilled whole until charred, or simmered soft in a hot pot.
Little new opens this particular week — most of what's blooming right now is simply what was already blooming a kō or two ago, holding on. Kantsubaki is one of the few genuinely reliable options, low and spreading, bred specifically to keep flowering through exactly this kind of week.
A harvest thanksgiving observed on the tenth night of the old lunar tenth month, concentrated in the Kantō region and stretching from Kōshin'etsu into southern Tōhoku — geographically almost the exact complement to Inoko, the similar western-Japan harvest custom observed a few weeks earlier this same season. In parts of Nagano, families perform 案山子上げ (kakashi-age): the scarecrow that has watched over the rice paddy all growing season is ceremonially brought up from the field into the yard and given mochi and offerings, on the belief that the paddy's guardian spirit is departing for the mountains tonight and deserves a proper send-off before it goes.
"The dry wind" — A regional term, especially associated with Gunma (old Kōzuke/Jōshū province), for the cold, bone-dry north wind that results once a moisture-laden Sea of Japan wind has already dropped its snow crossing the mountains — arriving on the Pacific side with nothing left to give but cold and static.
朔 (saku) properly denotes the astronomical new moon and, by extension, the first day of a lunar month — its use here to mean "north" comes from an old directional association in classical Chinese compounds, not from any literal connection to wind or cold. The kō's title borrows a moon-and-calendar word to describe a wind, a small reminder that premodern vocabulary for time, direction, and weather were far more entangled with each other than modern usage keeps them.
Karakkaze here is locally called 赤城颪 (Akagi-oroshi), after Mt. Akagi, and is famous enough to appear in the old regional saying 「かかあ天下と空っ風」("strong wives and the dry wind") describing the prefecture's defining characteristics — one social, one meteorological, mentioned in the same breath.
石焼き芋 vendors, calling out as they roll slowly through neighborhoods, are one of the more specific, recognizable sounds of this exact stretch of the calendar in much of Japan.
Smaller and less commercialized than Inoko, it's still kept in parts of Nagano, Gunma, and the Tōhoku prefectures, sometimes visible as simple household offerings rather than a public event.
"The wintry wind — it hides in the bamboo grove, and falls still."
A wind this dry and directional finds every gap in a house immediately — worth an afternoon checking weatherstripping before temperatures drop further.
Falling humidity plus indoor heating is exactly the combination that makes winter static worse — a small humidifier or a fabric softener sheet in a coat pocket both help more than they should.
Bashō's wind doesn't stop outright — it finds the one thing in the landscape that doesn't lose its leaves to it and goes quiet inside that shelter instead. Bamboo stays green and whole through exactly the wind that strips everything deciduous nearby bare. What's the equivalent shelter in your own life — not a place the difficulty avoids entirely, but one built well enough to absorb it without losing its shape?