same issue here, playing on tonberry, random freeze especially in primal ( titan being the worst, 5-10 seconds freeze and everything will be like fast forwarded, ifrit and garuda just minor lag, noticeable but still playable)

did simple ping test to tonberry , request time out in like once every 5 seconds (only happen during peak time, 8.00PM gmt+8 until midnight, other than mentioned time, no request time out)
I tried ping other game's server (eve and rift) both in US, no problems, no request time out
tried ping other randoms japan's website, no problems, no request time out

im not it tech guy, so pardon my method of testing