No I'm not japanese, I'm an Auzzie mate. The trick with pole spears is to chose your prey while still at distance, load, then use your skill to casually get within reach.
However the reefs I dive have kind of got corridors going through them where bigger fish do come through. And sometimes I will swim through them loaded hoping to chance upon one as I round a corner or something like that. then get it with the paralyzer before it gets away.
Many people like to hunt here with polespears. Some of them being really beautiful. And with the cost of one you could buy a good gun. (which is what I did for this year)
Heres a link that shows something in the middle between polespear / hawaiian sling and possible some elements of a gun. Never used one or seen one. I live in the sticks, no shops to check things out.
HUSEbçó