Haiku

     A haiku is not just a poetic form, but a genre. This means as "haiku" is not simply a form, but also has a standard language and subject. Haikus have a very simple language, usually one or two syllable words.  Their subject is common events, usually with a single focus object. Least important is the form. 
     An incorrect assumption is that a haiku is a three line poem, consisting of seventeen syllables, 5-7-5. In Japanese a haiku has seventeen 'sounds' which in English is about twelve to fifteen syllables. 
     Most haikus in English do not follow a single syllabic pattern. The are three lines, each just a few syllables. 
     see Lune
 

     old pond...
     a frog leaps in
     water's sound

     Matsuo Basho