If were sharing experience's with JP players let me share mine:

Standing around shouting for a group, my answer after over an hour?
.................................................................Nothing.

Standing around asking for help, my answer after an hour and a half?
.................................................................Nothing.

From my experience on my JP server, seems like when you want to group or need help a whole lot of nothing happens and you're simply on your own.
It's why I've been stuck using the DF for 2 weeks now for Titan HM, cause no matter how you shout or when you shout nothing happens.

I've even had a DF group quit on me stating they didnt want to play with me because I'm American.

My experiences so far. The server was better in 1.0 when it was Eng/JP mixed. At least then everyone didn't seem to feel that their servers were meant for only one spoken language.