Imo ga himo toku to musubite tatsutayama ima koso momichi somete arikere

妹が紐解くと結びて龍田山
今こそもみちそめてありけれ

Roma-ji: Imo ga himo toku to musubite tatsutayama ima koso momichi somete arikere
English Translation: My beloved's sash
tied, that I might loosen it—
Tatsuta's mountain
now, just now, it is that it
has begun to turn to red.
Meaning: Mount Tatsuta—whose name recalls tying the sash I would untie for my beloved—has now just begun to turn color.
Commentary: Book Ten Autumn Miscellaneous Poems 2211

Headnote continued from the preceding poem: "On Autumn Leaves"
This poem sings of Mount Tatsuta just now beginning to turn color, with the upper lines forming a preface that draws out "Tatsuta" from the lover's image of untying and tying a beloved's sash. Like 2194 it sings of Mount Tatsuta's first coloring, but whereas that poem linked it to the geese's arrival, this one adds a lover's mood.

The first line, "my beloved's sash," names the garment.
The second line, "tied that it might be untied," hints at lying together, and the upper lines form a preface leading into "tatsu."
The third line, "Mount Tatsuta," names the mountain famed for autumn leaves, the same as in 2194.
In the fourth line, "ima koso momichi," "koso" is an emphatic particle in kakari-musubi with "kere" in the last line.
In the last line, "somete arikere," "kere" is the perfective of "keri," answering "koso," closing with wonder at noticing the first color.
Source: Manyoshu
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