The bot problem is rising and real.

[Kurando]

I sometimes think the devs look on the Japanese server and wonder "what are these people in USA/Europe complaining about, I don't see any botting".

Bots exist on the JP worlds, not as many as on NA or EU but they are there for the devs to see. Thing is though a bot isn't a bot until it gets caught or reported, so many just continue to function for quite a while until anything is done about them.