Why would she identify with people from Japan? Is she Japanese? She could be of Thai, Filipina, Korean, Vietnamese or countless of Asian countries decent?
I have no idea. Perhaps she pulled monkey's from her posterior and set them aflight. Perhaps while you're running through your judgements of me, you'll process this fact; Asians behave differently than western folk. Even those raised in western society.
Hard as it is to believe, I think it will come out that she killed her child to retaliate against her ex-husband. I know in my childhood playmate's murder that was the case. Her husband refused her a divorce, so she killed my friend and then herself. One of five murders that have been friends or people I knew well.
In NG's case, maybe she is entitled to a little drama after both her fiance and her best friend have been murdered.