Michael Dylan Welch, will known poet and tanka authority, sent me this fascinating project.
The following translation (by Emiko Miyashita and Michael Dylan Welch) that was featured on the back of 150,000,000 U.S. postage stamps in 2012:
hisakata no hikari nodokeki harunohi ni shizugokoro naku hana no chiruran
the light filling the air
is so mild this spring day
only the cherry blossoms
keep falling in haste—
why is that so?
The poem is by Ki no Tomonori (紀友則), and the translation is from their book 100 Poets: Passions of the Imperial Court, published in 2008 by PIE Books in Tokyo. It’s a translation of the Ogura Hyakunin Isshu (100 poems by 100 poets), compiled in the thirteenth century by Fujiwara no Teika. To see pictures of the stamp and to learn more about the book, please see the following links (and a page of Welch’s own about my tanka):