Ureshiku mo aki no miyama no akikaze ni uigoto no ne no kayoikeru kana - Kinyo Wakashu(English Translation & Meaning)

うれしくも秋の深山の秋風に
うひ琴の音の通ひけるかな

Roma-ji: Ureshiku mo aki no miyama no akikaze ni uigoto no ne no kayoikeru kana
English Translation: How happy it is
that the autumn wind blowing
in the deep autumn hills
has blended with the music
of a koto played first time
Meaning: How glad I am that the autumn wind of the deep autumn mountains has joined with the sound of the koto played for the very first time.
Commentary: Book Nine Miscellaneous Poems I 542

How glad, the poet says, that the sound of a koto played for the first time has blended with the autumn wind in the deep autumn mountains. He rejoices that on the occasion of a first performance the music echoed with the mountain wind. Taking up the conceit of the preceding poem, 541, in which koto and pine wind blend, it celebrates a first playing of the koto.
From poem 541 to 543 three poems in a row sing of the koto's sound flowing to meet something else. The preceding poem has it meet the pine wind, this one the autumn wind, and the next the moonlight, each varying its partner.

First line, 'ureshiku mo', means how glad.
Second line, 'aki no miyama no', means of the deep autumn mountains, miyama being the inner mountains.
Third line, 'akikaze ni', means with the autumn wind, repeating aki from the second line. It corresponds to matsu fuku kaze ni in the second line of the preceding poem, 541.
Fourth line, 'uigoto no ne no', means the sound of a koto played for the first time, ui being a prefix meaning first.
Final line, 'kayoikeru kana', means how it has blended, the attributive of keri with the exclamatory kana. It takes up kayouramu in the third line of the preceding poem, 541.
Source: Kinyo Wakashu
Prev Poem: Koto no ne ya matsu fuku kaze ni kayouramu chiyo no tameshi ni hikitsubeki kana
Next Poem: Koto no ne wa tsuki no kage ni mo kayoeba ya sora ni shirabe no suminoboruramu