睍睆 (kenkan) means simply "beautiful-sounding," describing the quality of the uguisu's call rather than the bird itself — the two characters barely appear anywhere else in ordinary Japanese. The uguisu (Japanese bush warbler) is one of the 日本三鳴鳥 (Nihon sanmeichō), the three birds traditionally rated Japan's finest singers alongside the ōruri (blue-and-white flycatcher) and komadori (Japanese robin), and its nickname 春告鳥 (harutsugedori, "the bird that announces spring") reflects how reliably its call is treated as the actual proof that the season has turned, ahead of anything visibly blooming yet.
The bird itself is a plain, well-camouflaged olive-brown, staying low in dense undergrowth rather than showing itself in the open — a mismatch with its own reputation that has caused a specific, well-documented mix-up for centuries (see below).
A translucent, delicate spring fish moving upriver to spawn from February — historically fished from the Sumida River by torchlight, a sight Edo-period writers treated as its own sign that spring had arrived.
In good season through late winter into early spring, prized raw for its firm texture and faint iron sweetness.
Continuing in season, its firmer bitterness a contrast to sweeter winter citrus.
At its best right now, the definitive vegetable of this exact stretch of the calendar.
Mild and peppery, good raw in salads or lightly cooked in a hot pot.
Jinchōge's small clustered flowers are easy to walk past without noticing, but its fragrance — sweet, heavy, carrying much further than the flower's size would suggest — usually announces it well before you'd have spotted it by sight.
A pastime dating to the Heian court, where captive uguisu were brought together to have their song formally judged against each other — the Atago district and Ōhara region were both renowned for producing especially fine-voiced birds, and rival factions argued their district's birds were superior. The custom continued into the Edo period, when caged uguisu became one of the era's most popular pets specifically for this purpose, before keeping wild birds in this way was banned under Japan's first wildlife protection regulations in 1873.
"A warbler on the plum" — A fixed pairing in classical poetry and art going back to the Kokin Wakashū, treated as the definitive image of early spring — despite the fact that the bird conventionally painted perched on a plum branch, bright green with a white ring around the eye, is actually a mejiro (Japanese white-eye), not the real, plainer olive-brown uguisu, which keeps to cover and is rarely seen in the open at all.
黄鶯 (kōō) pairs 黄 (yellow) with 鶯 (uguisu) — a slightly misleading combination, since the bird itself isn't yellow at all; the character choice likely reflects the old, blurred boundary in classical usage between the uguisu and genuinely yellow-bodied birds, the same confusion that still causes the uguisu/mejiro mix-up today.
The two Heian-era districts most associated with prized singing uguisu, and the rival camps that formed around them — an early, aristocratic version of the same competitive spirit that later drove Edo-period uguisu-keeping.
The bird itself stays hidden in undergrowth, so treat this as a listening exercise rather than a spotting one.
The bright green coloring is closer to a mejiro than a real uguisu — worth having the mix-up in mind while you eat one.
"I only came to look at the plum blossoms — and here's the warbler, complaining "go away, go away," as if put out by my visit."
An uguisu's call is rougher and less musical early in the season than it becomes by late spring, after weeks of the same bird calling from the same territory.
A bright green bird with a white eye-ring in a plum tree is almost certainly a mejiro, not the bird actually singing nearby.
The Kokinshū poet hears a scold in the uguisu's call, but the bird isn't actually addressing anyone — it's singing its own claim to its own territory, the way it would whether or not a person happened to be standing nearby to take it personally. Reading intention into something that was never about you is an easy, almost automatic mistake, and this poem is gentle enough to make it into a joke rather than a complaint. What have you recently taken personally that, on a closer look, genuinely had nothing to do with you at all?