I don't now about 12,000 years, but I'd LOVE to date this island:
Lat. 27°52'1.67"N
Long. 128°13'52.82"E
You have heard of this thing called Google, haven't you?
You could, say, look up some of this stuff.
For example:
http://english.ryukyushimpo.jp/2011/07/20/1950/
Which says:
July 29 (2011) marks 52 years since the entire population of Iwo-Tori-shima (formerly Gushikawa Village, currently Kumejima Town) were forced to leave the island due to a volcanic eruption.
So, yes, ruins...but not quite as old as you think.
Funnily enough, the island was also (and maybe still?) used for extracting sulphur.
Are we now going to move onto mining areas that have since closed down?