I suggest that you do those follow:

1. speedtest.net and check your connect to Tokyo
2. if you fail in upload to tokyo, call your ISP and ask them to check their end, if they say thing are fine and problem remain, do step 3
3. mail to SE and tell them all the thing you did (expect the reply you get will piss you up but keep press on as I had R0 problem before, send 3 email to got 1 answer that they admit its their end that having problem)