There's actually a notification that say's you're banned (I translated the japanese screenshot that someone posted in the JP thread)
There's just a lot of connection errors lately so unless it says that you got banned, it's just their hamster servers dying.
Edit -I got some info from japanese...
Looks like only 2 users posted on being banned for the JP version.
I dug around the thread, it's unclear why or how they got banned since the timeframe is large (could've been version upgrades in JP version) or they could've done doing something dumb that got flagged in their system (trying to...
