Gasa (or Kasa) was a form of poetry popular during the Joseon Dynasty in Korea. Gasas were commonly sung, and were popular among yangban women. Jeong Cheol, a poet of the 16th century, is regarded as having perfected the form, which consisted of parallel lines, each broken into two four-syllable units. The form had first emerged during the Goryeo period. In modern Korean, the word is also synonymous with "lyrics of a song" in the context of modern music, an etymology that is shared with Japanese and Chinese. See also Korean poetry Korean literature History of Korea References Kim, Dae-haeng. 2009 Classical Poetic Songs of Korea. Ewha Womans [sic] University Press. See Section VI. "Gasa: Long Vernacular Verse." Poetic forms Korean poetry Joseon dynasty Important Intangible Cultural Properties of South Korea