Funsam said:
Have you noticed all maint is in euro prime time, & at jap midnight time.
And this has nothing to do with SE being JP. It's more like this game have more JP players, so better do maintenance when less people are on. (i.e : during EU prime).
Not to mention technical reasons, when server are back online, less player will hammer it to log on ASAP since JP players will be sleeping and like half of NA won't be back from work. And if something goes wrong during maintenance and if a quick emergency update is needed, it'll be easier to perform it while server is half empty than during JP prime on a Saturday night.