>there are speculations that the underwater pyramids of Yonaguni could be the remains of a civilization 5 thousands years old
As far as I'm aware, the all but universal consensus among archaeologists and scholars (and the Japanese government) is that the "underwater pyramids" of Yonaguni are entirely natural.
As far as I'm aware, the all but universal consensus among archaeologists and scholars (and the Japanese government) is that the "underwater pyramids" of Yonaguni are entirely natural.