Tamakushige ashiki no kawa o kyō mite wa yorozuyo made ni wasuraeme ya mo

玉櫛笥蘆城の川を今日見ては
万代までに忘らえめやも

Roma-ji: Tamakushige ashiki no kawa o kyō mite wa yorozuyo made ni wasuraeme ya mo
English Translation: Like a jeweled comb box,
the river of Ashiki,
seeing it today,
even for ten thousand ages,
how could I ever forget?
Meaning: Having seen the river of Ashiki today, could I ever forget it, even in ten thousand ages? Never.
Commentary: Book Eight Autumn Miscellaneous Poems 1531

Headnote continued from the preceding poem: "Two poems from a banquet held by the lords, officers, and officials of Dazaifu at the Ashiki post station in Chikuzen Province"
Having seen the river of Ashiki today, the poet says he will never forget it, praising its beauty. Like the preceding poem, it comes from the banquet at the Ashiki post station; singing separately of the fields and the river, the pair praises the whole land.
The note says, "The authors of the above two poems are unknown."

The first line, "tamakushige," a beautiful comb box, serves here as a pillow word for "Ashiki."
The second line names the river flowing beside the Ashiki post station. It pairs with "the fields of Ashiki" in the preceding poem, praising the land through its fields and its river.
The third line means "having seen it today," echoing "from this day on" in the preceding poem.
The fourth line, "for ten thousand ages," expresses eternity, like "for all time" in the preceding poem.
The final line, with the potential "rayu," conjectural "me," and rhetorical "ya mo," strongly denies: could it be forgotten? Never.
Source: Manyoshu
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