not sure if it was this or the other thread were people were wondering about the Japanese reactions to the lockdown, but...

So, I took a look at the Japanese forum and so far found 1 thread about this with 9 pages atm. The discussion in it is more about the lockdown happening without prior notice than the lockdown itself.
Also it seems that some people have the habit of 'temporarily' transferring their characters off to smaller servers during content lull/catch up patches and are now unable to return to their high pop servers for 4.0 progression (why the hell one would even consider wanting to waste money like that is beyond me....), as well as those who planned to transfer some friends starting the game over but are now unable to.
There are also some suggesting to at least allow those being brought in trough a recruit a friend code to be able to move to the currently locked servers