1  Jan Lauwereyns

2  Wellington, New Zealand

3  There is no distinct genre for short poems, though of course some poems are short...

6  Haiku is certainly known worldwide, and of course also in New Zealand. I think tanka is only known to people with a more specific interest in Japanese culture and/or literature.

7 I don't think it has had a general influence on English or New Zealand poetry, though of course some individual poets might have benefited from getting to know about tanka and/or haiku.

8 Perhaps an emphasis on suggestion and the idea that a single moment in time can be the focus of multiplicity in experience. 

9 This coincides with my answer on Q8 - the short poem, when done well, can have the power to resonate, and go well beyond the immediacy of description or the linearity of narrative. It can be a moment with a peculiar openness, compatible with suggestion and multiplicity (or ambiguity) in a way that creates a surplus of meaning rather than falling prey to obscurantism.