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 in non-Japanese haiku or by modern writers of Japanese "free-form" haiku. The best-known Japanese haiku is Bashō's "old pond": This separates into "on" as: Translated: Another haiku by Bashō: This separates into "on" as: Translated: This haiku by Bashō illustrates that he was not always constrained to a 5-7-5 "on" pattern. It contains 18 "on" in the pattern 6-7-5 ("ō" or is treated as two "on".) This separates into "on" as: Translated: This haiku by Issa illustrates that 17 Japanese "on" do not always equate to 17 English syllables ("nan" counts as two "on" and "nonda" as three.) This separates