Haiku and tanka are traditional Japanese poetry forms that are based on syllable structure. Haiku themes are typically based on seasonal (季語) themes and involve a 5-7-5 syllable structure. Tyler's Haiku and Tanka samples available at the following link:
Tyler's Online Poetry and Fiction Page at Ten Colors
These haiku (5-7-5) and tanka (5-7-5-7-7) employ some experimental structures, such katakana (カタカナ), mimetic, and English language inclusion.