Wakarenaba uraganashikemu a ga koromo shita ni o kimase tada ni au made ni

別れなばうら悲しけむ我が衣
下にを着ませ直に逢ふまでに

Roma-ji: Wakarenaba uraganashikemu a ga koromo shita ni o kimase tada ni au made ni
English Translation: Once we have parted
how sad your heart will be;
this robe of mine,
wear it close beneath your clothes
until we meet face to face
Meaning: Once we part, your heart will be full of sorrow; so wear this robe of mine close against your skin, until the day we meet face to face.
Commentary: Book Fifteen Poems of the Envoys to Silla 3584

Headnote continued from the preceding poem: "The envoys sent to Silla grieve at parting and exchange poems, express their sorrowful feelings on the sea route, and recite old poems suited to the places they pass"
Thinking of the sorrow of parting, the wife entrusts her robe to her husband and asks him to wear it against his skin. A garment one wore was thought to hold the wearer's spirit, and exchanging robes and wearing them close was a custom for keeping hearts bound even when apart. The closing "tada ni au made ni" is also used in 3751 and 3778 by Sano no Otogami no Otome in the latter half of this book, and the motif of entrusting an undergarment overlaps with 3751.
The first half of this book gathers the poems of the embassy sent to Silla in the eighth year of Tenpyō (736), arranged in the order of the journey from the departure at Naniwa to the return. A left note reads "the above eleven poems are an exchange," and these opening eleven poems are the parting exchanges between the envoys and their wives before departure. None of the authors is named.

First line, "wakarenaba": "na" is the irrealis of the perfective auxiliary "nu": once we have parted.
Second line, "uraganashikemu": "ura" means heart; how sorrowful at heart it will be. "Kemu" is conjecture, and the poem breaks here after the second line.
Third line, "a ga koromo": the robe the wife herself had worn, given to her husband.
Fourth line, "shita ni o kimase": "shita" is beneath the outer garments, next to the skin; "o" is an emphatic interjectory particle and "mase" an honorific imperative: please wear it as an undergarment.
Fifth line, "tada ni au made ni": "tada ni" means directly, without go-betweens, marking the limit: until the day of reunion. In the next poem, 3585, the husband answers, "which she gave me, saying wear it beneath."
Source: Manyoshu
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