What is "dodoitsu"

n. (context poetry English) A rhyme-less and meter-less poem divided into 7-7-7-5 syllables per line.

Dodoitsu (都々逸) is a form of Japanese poetry developed towards the end of the Edo Period. Often concerning love or work, and usually comical, Dodoitsu poems consist of four lines with the syllabic structure 7-7-7-5 and no rhyme.for a total of 26 syllables, making it one of the longer Japanese forms. The form, tone and structure of Dodoitsu derive from Japanese folk song traditions.