The only thing that bothers me is that, if a new Japanese members joins, we will get a row of beautiful Korean names and then some (ugly) Japanese name...
(No offense, but I like Korean names better than Japanese ones).
And I don't want a Japanese member
EDIT:
It will be like: Kahi (Jiyoung) - Jung Ah - Jooyeon -
Bekah 
- Yoo Jin - Hye Rin - Jin Ah - Soo Young - Lee Young - and some Japanese name here -
It doesn't feel right. And yes, I'm still upset about the fact that Bekah is leaving the group, so please forgive my rant about a Japanese member