The rain this kō describes has a specific character and a specific name: 時雨 (shigure), a shower that arrives out of a clear sky, falls hard for a few minutes, and moves on, often leaving sun behind it almost immediately. It isn't the long, even soak of tsuyu in June or the lingering autumn rain front of a few weeks earlier — shigure is quick, localized, and classically associated with the mountain-ringed Kyoto basin, where fast-moving clouds off the hills produce exactly this kind of here-and-gone shower.
There's a folk-observed rhythm to it, summarized as 一雨一度 (hito ame ichido, "one rain, one degree"): through this stretch of autumn, high and low pressure systems alternate roughly weekly, and each time a front brings rain, it drags in slightly colder air behind it. The temperature doesn't fall in a smooth line — it steps down, one shower at a time.
Continuing to improve as the water cools — this is the start of the run that peaks in deep winter.
The fishery opens in early November in most regions — the very first catches of the season start appearing now.
In full season now — best after a rest at room temperature until the skin gives slightly near the stem.
Mid-season varieties are in full swing, crisper and less sweet than the very last varieties of December.
Sweetening further with each cold snap — the backbone of the nabe season now properly underway.
Good simmered slowly in oden or dashi, where it takes on flavor while staying tender rather than mushy.
Earthy and fibrous; classically shaved into kinpira gobō, sweet-savory with soy, mirin, and sesame.
Tsuwabuki's yellow, daisy-like flowers open now against thick, glossy, almost tropical-looking leaves — a plant that looks like it belongs to a warmer season entirely, blooming right at the point everything else is shutting down for winter. It's a common sight at temple gardens specifically because it tolerates shade well, doing its work in the corners other autumn flowers give up on.
When a strong north-to-northwesterly wind blows under a winter-pattern pressure system — high in the west, low in the east — for the first time in a given autumn, the Japan Meteorological Agency issues a formal announcement: kogarashi ichigō. It's only declared for the Tokyo and Kinki regions, based on wind direction and a minimum speed around 8 m/s, and it's treated as a small seasonal news event each year — the sky's own confirmation that the mild part of autumn is over.
"One rain, one degree" — A piece of folk-observed weather wisdom describing how autumn's temperature drops in discrete steps through this stretch of the calendar — each passing rain front pulling in slightly colder air behind it, rather than the cooling happening smoothly day by day.
霎 specifically denotes a brief, light rain — distinct from the everyday 雨 (ame) and from 時雨 (shigure), the common word for exactly this kind of shower, which the kō's own reading uses. The character appears almost nowhere else in ordinary Japanese; its entire remaining job is naming this five-day stretch.
Shigure showers rarely last more than twenty minutes — a small folding umbrella you can put away quickly suits the weather better than a large one you're stuck carrying dry through the next hour of sun.
Wet stone, wet moss, and the first turning leaves read very differently in the clear light that typically follows a shigure shower than they do under flat, dry sunshine.
"First winter shower — even the monkey looks like he wants a little straw raincoat."
With daily temperature swings widening under 一雨一度, a single sweater is often wrong by midday — a light jacket over a T-shirt handles both ends better than one heavy layer.
The first catches of snow crab command a premium; waiting two or three weeks after the season opens usually means better prices for comparable quality.
Bashō's monkey doesn't have a raincoat and isn't going to get one — the joke and the tenderness are the same observation, that even a wild animal flinches from the year's first cold shower exactly the way a person does. Shigure comes and goes in minutes; it's the kind of small discomfort that doesn't require solving, just sitting through. What's a small, passing discomfort in your week that you're treating as bigger than it is?