Who knows? I will leave that one up to the experts. But I imagine it will be argued over for years to come, just like the Bimini Road/Wall (whatever you want to call it).
The monoliths in Japan are not really pyramids. They are plateau shaped. The rock is called beach stone and it breaks off at right angles. There are more examples of it above water on the islands around the monoliths.
thanks dell,yeah the post got split into pyramids and bimini,the special i saw talked about the "roads" forming a "J"shape used for docking ships and in my most humble opinion the pyramids are natural