summer night –
even the stars
are whispering to one another!
This haiku, supposedly translated from Issa by Robert Hass, is lovely but not authentic. In the Complete Works of Issa (Issa zenshû), there are only thirteen haiku that contain the phrase, "summer night" (natsu no yo). None of them mention "stars" or "whispering." One can only conclude that Issa did not write this haiku.
—note by David G. Lanoueback