Kawakami ni yūdachi surashi mikuzu seku yanase no sanami tachisawaku nari - Shika Wakashu(English Translation & Meaning)

川上に夕立すらし水屑せく
簗瀬のさ波立ち騒ぐなり

Roma-ji: Kawakami ni yūdachi surashi mikuzu seku yanase no sanami tachisawaku nari
English Translation: Upstream on the river
an evening shower must be falling—
where the fish weir
holds back drifting debris,
the ripples rise and churn.
Meaning: An evening shower must be falling upstream, for at the fish weir that holds back the drifting debris the ripples are rising and churning.
Commentary: Book Two Summer Poems 78

From the churning ripples at the fish weir before his eyes, the poet infers an unseen evening shower upstream. It is a vivid scene that captures the sudden change of a summer evening's weather through the look of the river.
After the summer moon of poem 77, a summer evening shower follows. Just as poem 65 knew of the rising rainwater from the river's sound, this poem too learns of rain from the river.

First line, "upstream," points to the unseen upper reaches.
Second line uses rashi, inference based on evidence, and the poem pauses here.
Third line describes the weir holding back debris carried down by the stream.
Fourth line, "the ripples at the weir," is the sight before him that serves as evidence.
Fifth line uses nari for inference from sound, showing that the noise of the churning water reaches his ears.
Author: Sone no Yoshitada
Source: Shika Wakashu
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