classic waka stream

落ちたぎち流るる水の岩に触れ
淀める淀に月の影見ゆ
Roma-ji

Ochitagichi nagaruru mizu no iwa ni fure yodomeru yodo ni tsuki no kage miyu

English Translation
Plunging, seething down,
the water rushing on its way
strikes against the rocks,
and in the pools where it lies still
the moon's reflection can be seen.
Meaning
The water plunges and seethes, rushing on until it strikes the rocks, and there, in the still pool where it slows, the light of the moon is reflected.
Commentary
Book Nine Miscellaneous Poems 1714

Headnote continued from the preceding poem: "Two poems from a royal progress to the Detached Palace at Yoshino"
Where the seething waters of the Yoshino River strike the rocks and settle into a pool, the moonlight lies quietly reflected. Motion and stillness, the sound of water and the light of the moon, are set against each other in a vivid landscape.
This is the second of two poems from the progress to Yoshino, and the left note says their author is unknown. Where the preceding poem depicts mountain and bird by day, this one depicts river and moon by night, so that the pair portrays Yoshino by day and by night.

The first line, "plunging, seething down," conveys the violence of the falling water.
The second line, "the water rushing on its way," carries on that force.
The third line, "strikes against the rocks," describes the water meeting stone.
The fourth line, "and in the pools where it lies still," doubles yodomu and yodo, emphasizing the calm of the pool.
The final line, "the moon's reflection can be seen," closes with miyu, as does "I see the moon go sailing by" in 1701.
Source
Manyoshu
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