That’s your ping on your local server since it says server = LA. There’s no way in hell one can get a 4ms ping on a Japanese server if you’re in USA, that’s impossible at this time.
As mentioned already, bandwidth speed isn’t as important as how low and stable is your ping on a specific server, best results would be on a server that gives you consistent low pings without fluctuations which cause lag spikes. Believe it or not 1Mbps up and down is more than enough to play SF4 online, I’m sure it can be perfectly fine even with less too, that’s just an example.
At speedtest.net manually choose a Japanese server and see how much ping it gives you. Anything above 100ms is just a waste of time IMO (200ms+ is just a joke lol), I can manage with some 50-70ms connections but I prefer to play in the sub 40ms range to not get fucked by lag too much.
As for general tips to get a stable connection:
- Port forward the necessary ports in your router for your console or just put it in DMZ mode i f you’re lazy.
- Use wired connection
- Don’t download porn while playing online lol, seriously though don’t use the internet much while playing because that can fuck up your gameplay, specially if you didn’t configure your router’s QoS settings.