Re: The Tokyo server is getting worse again.
Tokyo resident. Used to get 30ms on JCOM cable modem. Switched to Gamewith Hikari, went down to 5ms at server selection using a Buffalo router. Still saw occasional games jump to over 100ms. Sometimes rebooting the router helped. Sometimes switching to a different Tokyo server helped. Tried a router from IO Data and the occasional 100ms games decreased significantly. Even when they still happen switching servers is usually enough. Last night had a string of games on different Tokyo servers over 100ms and rebooting the IO Data router cleared it.
Not sure what causes the in game latency jumps. Guessing it's multiple things. If it's a DDoS against a particular server then switching servers is what clears it. If it's a memory leak in the router then rebooting it is what clears it.
Hope that helps.