Yeah.. there is something going on there that needs to be tracked down. I'm on US-East Coast, and I stay mostly 190-200 when I hammer that IP with pings. Trace shows me going across the US to LA, then running undersea lines to asianet. From then on the pathing is fairly similar, except for a few hops:
Code:
14 195 ms 195 ms 194 ms ip-202-147-0-52.asianetcom.net [202.147.0.52]
15 196 ms 195 ms 197 ms gi1-0-0.gw1.nrt5.asianetcom.net [202.147.0.178]
16 196 ms 197 ms 213 ms squareco.asianetcom.net [203.192.149.210]
17 197 ms 196 ms 198 ms 61.195.56.129
18 209 ms 197 ms 197 ms 219.117.144.66
19 188 ms 189 ms 290 ms 219.117.144.53
20 187 ms 192 ms 190 ms 219.117.144.41
21 196 ms 195 ms 200 ms 219.117.147.190
22 193 ms 193 ms 192 ms 124.150.157.29
What concerns me is the massive spike you take between 202.84.223.42 and 202.84.249.50 (84 to 227?). They both list with the Hong Kong jurisdiction. Geolocation could be off I guess... wouldn't be the first time. Even if that first one is actually an exchange in AU that connects to transit to HK, that seems a bit higher than it could/should be getting into Japan (not to mention a bit around the elbow to get to the thumb). Time Warner runs more directly to PACNET in Japan, so I only get about a 100ms jump going all the way from LA to Tokyo.
IDK if they have other options for routing you more directly or not---they may have a way to get you more directly into Shinjuku or maybe even further south by way of Osaka should be better. The trick is getting in touch with someone in the know. If they have an online support portal/email option, I wonder if you may gain more traction if you were to forward them the data you have on the route. It's worked for others in the past here in the states.