hello guys,
whatever that coin/plate is made up of (undetermined well mixed type of different metals and more prominently bronze color), yes, it is a valuable and memorable, probably a historic and significant piece of metal.
And yes it is real and the good news is, it's presence already reached one of the royalties. My contact was able to send the message direct to the empire of Japan and lately had already made a talk with the royalties. Yes, it's true that this item is valuable to them and they confirmed that they have been looking for this and that they even made a handsome reward for its return. If this is not so important for them, they have already set a date this month and they are coming to the country to receive it. So quick? I hope i will be able to take a photo personally of this item and the turnover when they come... wow! that would be a historic and significant thing to do.