Omoiyori mite wa yorinishi mono ni areba hitohi no aida mo wasurete omoe ya

思ひ寄り見ては寄りにしものにあれば
一日の間も忘れて思へや

Roma-ji: Omoiyori mite wa yorinishi mono ni areba hitohi no aida mo wasurete omoe ya
English Translation: Drawn to you in thought,
and when I saw you, wholly
drawn, I came to you;
so could even for one day
I forget and think of you
Meaning: My heart was drawn to you, and once I saw you, I was wholly drawn to your side; how then could I forget you, even for the space of a single day?
Commentary: Book Eleven Love Poems Ancient and Modern I 2404

Headnote continued from the preceding poem: "Expressing One's Feelings Directly"
Having set his heart on her, and having been drawn wholly to her side once they met, the speaker says he could never forget her for even a single day. Repeating the word "yoru," to be drawn, it conveys a heart pulled steadily toward the beloved and pledges unchanging love.
The last line is a rhetorical question, strongly denying that he could forget her even for a day. Just as poem 2391 of this book sang of longing in the brief span from yesterday evening to this morning, this poem too uses the short measure of a single day to show how unceasing love is.
The author is unknown; according to the left note, the poem comes from the Kakinomoto no Hitomaro Collection. That collection is thought to contain both Hitomaro's own poems and poems by others that he recorded. Kakinomoto no Hitomaro was a court poet active in the reigns of Empress Jito and Emperor Monmu, and is counted among the Thirty-Six Immortal Poets.

First line, "omoiyori": "drawn to you in thought," showing that his heart was set on her even before they met.
Second line, "mite wa yorinishi": "having seen you, I was drawn to you entirely." Repeating "yori" from the first line, it shows that meeting deepened his feelings still further. "Nishi" is the continuative form of the perfective "nu" with the attributive form of the past "ki."
Third line, "mono ni areba": "since it is so." The perfective form with "ba" makes an established condition, linking the first half as the reason for the second. The line has an extra syllable.
Fourth line, "hitohi no aida mo": "even for the space of a day." The particle "mo" emphasizes the brevity of even a single day.
Fifth line, "wasurete omoe ya": "would I think of you having forgotten? No, never." The perfective form with "ya" makes a rhetorical question, closing the poem with a firm assertion of unchanging love.
Author: Kakinomoto no Hitomaro Collection
Source: Manyoshu
Prev Poem: Tamakuse no kiyoki kawara ni misogi shite iwau inochi wa imo ga tame koso
Next Poem: Kakiho nasu hito wa iedomo komanishiki himo tokiakeshi kimi naranaku ni