classic waka stream

ことわりの秋にはあへぬ涙かな
月の桂もかはる光に
Roma-ji

Kotowari no aki ni wa aenu namida kana tsuki no katsura mo kawaru hikari ni

English Translation
Autumn is a thing
reason allows, and even
so I cannot bear
these tears: for the katsura
in the moon has changed its light
Meaning
Grief in autumn is only reasonable, and still these tears are past bearing: even the katsura in the moon has turned, and its light with it.
Commentary
Book Four Autumn Poems I 391

Headnote: topic unknown.
The sixteenth poem on the moon. Grief in autumn is only to be expected, and it is unbearable all the same. The headnote gives no topic and nothing is known of the circumstances.
The poet, known as the daughter of Shunzei, was in fact his granddaughter and adopted daughter. This is her second appearance in this book, after the three hundred and seventy-fifth poem.
The time is a night in autumn; no place is given.
The occasion of composition is not recorded.
The tradition that a katsura tree grows in the moon comes from Chinese books and is used in Masafusa's two hundredth poem in Book Three.

The first line means what stands to reason, so that grief in autumn is granted at the outset as only natural.
The verb in the second line adds the sense of doing a thing to the end and is negated, the form of Shigeie's three hundred and eighty-eighth poem.
The third line names what cannot be borne.
The particle in the fourth line carries the sense of even the katsura in the moon. As trees on earth take colour, so, the poem imagines, does that tree.
The closing line means: by a light whose colour has altered. The moonlight itself is said to carry the colour of autumn. Beginning from the language of reason and arriving at what reason cannot settle, the poem handles the relation of feeling to argument, as Saigyo's three hundred and sixty-seventh did in asking for a cause.
Author
The Daughter of Fujiwara no Shunzei
Source
Shin Kokin Wakashu
Other