classic waka stream

Before I knew it,
has the Fifth Month come?
from the mountain depths,
the cuckoo at last now
has begun to cry aloud.

Meaning
Before I knew it, has the Fifth Month come? The cuckoo in the mountains has now begun to cry.
Commentary
Book III, Summer Poems

The poem expresses the emotion felt upon hearing at last the long-awaited cry of the cuckoo.
Author
Unknown Poet
Source
Kokin Wakashu
Other