Great Id
@jeremy_norbury
Corokia are New Zealand plants. Corokia cotoneaster is also known as 'wire netting bush' or in Maori 'koriko'.
Don't get confused with the Northern hemisphere Cotoneasters. I guess this one got the specific name because the leaves look a bit like some Cotoneasters.
FYI, although the growth habit is interesting, the long internodes and alternate budding makes it really hard to get good ramification on Corokia.
Don't let that deter you though, prove me wrong and grow a great bonsai Corokia.
Good luck.