i agree using 3rd party native Japanese.
to solve this, make skype calling and 3rd party can open talking (calling in skype) not chatting about anything little discussion, with japan language.
So Who is real / not, its will shown by it self.
it's not really a scam when you allow it to happen to yourself.
you're pretty much gave away the money.
now you want to somebody else to take responsibility for it.
because of the legal setup of Bitcoin and because of legal set up at this forum there is nothing you can do.