Senryu

Senryu (川柳) is a Japanese form of poetry similar to haiku in construction: three lines with a syllable pattern of 5-7-5. However senryu tend to be about human foibles while haiku tend to be about nature. Senryu do not need to include a season word like haiku. Much modern haiku is more similar to senryu than traditional haiku.

Paul H. Henry has called for the deprecation of humorous senryu (http://www.phenry.org/junkdrawer/haiku/) in the English language in favor of the limerick.