Haiku such as "kyo" () may look like two syllables to English speakers but are in fact a single "on" (as well as a single syllable) in Japanese. In 1973, the Haiku Society of America noted that the norm for writers of haiku in English was to use 17 syllables, but they also noted a trend toward shorter haiku. Shorter haiku are very much more common in 21st century English haiku writing. Some translators of Japanese poetry have noted that about 12 syllables in English approximate the duration of 17 Japanese "on". Also in translations four lines is more appropriate for
Haiku the colloquialism of the language and is closest to natural conversational rhythm, necessary to carry the weight of the hokku A haiku traditionally contains a "kigo", a word or phrase that symbolizes or implies the season of the poem and which is drawn from a "saijiki", an extensive but prescriptive list of such words. Kigo are often in the form of metonyms and can be difficult for those who lack Japanese cultural references to spot. The Bashō examples below include "kawazu", "frog" implying spring, and "shigure", a rain shower in late autumn or early winter. Kigo are not always included