Oay you do seem to have some latency going on there. So with a 1500 line speed try to boost up then to oh go for 46720 for a RWIN.
Here is a download only speed test closer to you in New Zealand. a 1m and 500k test from here »
jetstreamgames.co.nz/spe ··· 1MB.htmlAnd this is in San Francisco »
sfo.speakeasy.net/Rin some test after the tweak and check your speed. If it dose not go up much try a RWIN of 55480
Good luck with improved speed. And from Japan a ttl of 128 would likely be best if you don't already have that.
