[Nyororin]

She will have as much a chance as any other Japanese woman going for the job. I don`t see how English ability would help with management or administration in Japan unless she is wanting to go into a tourism related field (hotel, etc). I imagine that experience living abroad and English ability will improve her chances.
Otherwise, just like anyone else applying, I highly doubt she`s just going to be able to hop in and land a management or administrative position. It`s most likely she`ll have to work her way up.