sasuke is also a female obasan. 
cos in japan it is impossible to find child actor to voice anime
cos afterall they are too young they might be inexperienced, not
forgetting they can't do it fulltime cos they still have
school.
they also can't get male ojisan to do the kids's voice cos they
doesn't sound like a kid.
so the only way out is to find female obajans for the job.
