Haiku a phrase in the remaining 12 "on" (it may not be apparent from the English translation of the Issa that the first five "on" mean "Edo's rain"). In comparison with English verse typically characterized by syllabic meter, Japanese verse counts sound units known as ""on"" or morae. Traditional haiku consist of 17 "on", in three phrases of five, seven and five "on" respectively. Among contemporary poems "teikei" ( fixed form) haiku continue to use the 5-7-5 pattern while "jiyuritsu" ( free form) haiku do not. One of the examples below illustrates that traditional haiku masters were not always constrained by
Haiku in English poets and scholars attempting to understand English-language haiku aesthetics and history include William J. Higginson's "Haiku Handbook" (McGraw-Hill, 1985) and Lee Gurga's "Haiku: A Poet's Guide" (Modern Haiku Press, 2003). Significant contributors to American haiku include Hackett, Virgilio, Charles B. Dickson (1915–1991), Elizabeth Searle Lamb (1917–2005), Raymond Roseliep (1917–1983), Robert Spiess (1921–2002), John Wills (1921–1993), Anita Virgil (b. 1931), and Peggy Willis Lyles (1939–2010). Other major figures still active in the American haiku community include Lee Gurga, Christopher Herold, Gary Hotham, Jim Kacian, Michael McClintock, Marlene Mountain, Marian Olson, Alan Pizzarelli, Alexis Rotella, John Stevenson, George Swede, vincent tripi, Michael