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
Japanese poetry the "honored guest" composing a few beginning lines, often in the form of the "hokku" (which, as a stand-alone piece, eventually evolved into the haiku). This initial sally was followed by a stanza composed by the "host." This process could continue, sometimes with many stanzas composed by numerous other "guests", until the final conclusion. Other collaborative forms of Japanese poetry also evolved, such as the "renku" ("linked-verse") form. In other cases, the poetry collaborations were more competitive, such as with "uta-awase" gatherings, in which Heian period poets composed "waka" poems on set themes, with a judge deciding the winner(s). Haiku