Walterhero you have not heard of scams for money? Let's look at this logically. If you found a possible spot that will possibly make you rich would the first thing you do is call everyone to find it or keep it a secret and look for it yourself? This is the same as those scam Emails promising to get you rich.
Name: Nilo
Country:
Title: Dug treasure
Comments: Dug and found a metal box containing black in color soil somewhat like a carbon almost 5 sacks full with 7 bars of marble rock and don't know what kind of thing is this?
The day I read on CNN, BBC, Fox or some other substantial media place that they sent a crew and verified that there is in fact a Yamashita treasure then, and only then I will accept it as a legitimate hunt, otherwise it remains nothing else but an outright scam.
I got this from Wikipedia:
Someone should tell these treasure seekers that if they haven't found it by now then its probably not there or someone took it already. Meanwhile tour operators are making a mint over the heads of gullible tourists.