In fact, that isn't a senryu either. Haiku and senryu count morae, not syllables. The mora is a unit of timing; a short syllable is one mora and a long one is

In fact, that isn't a senryu either. Haiku and senryu count morae, not syllables. The mora is a unit of timing; a short syllable is one mora and a long one is two morae. So 'tokyo', which is two syllables, is counted as 4 morae since both 'o's are long. Similarly, 'Nippon' is counted as 4 morae - 'ni-p-po-n'. Confusion about this is why English haiku tend to be so long: compare furu ike ya kawazu tobikomu mizu no oto to wind catches lily scatt'ring petals to the wind: segmentation fault