The Lost City
Does Atlantis or Lemuria exist off the coast of Japan? The attraction of hammerhead sharks in the sea off the Yonaguni Island has been a popular attraction for divers. But, the discovery in 1987 by Kihachiro Aratake, a director of the Yonaguni-Cho Tourism Association, while searching for a spot to watch for sharks, greatly increased the popularity of this dive location. What he noticed was some formations in the seabed that seemed to be architectonic structures. Since Aratake’s discovery, there have been expeditions and scientific dives in this spot to attempt to uncover the mystery of these formations.
They discovered, what seems to be a monument that consisted of mudstones and very fine sandstones that they have said was deposited about 20 million years ago. This monument measures about 490 by 130 feet, is about 90 feet tall, with the top being about 16 feet below sea level. Some additional dives discovered faint etchings in rock formations that were of animals, including a horse like sketch that resembled a character from the Kaida script.
To this day, there is still mystery and skepticism regarding this find and questions if it man made or just formed due to drastic movements and fluctuations of the sea. It has been said that the huge tsunami in April 1771, that struck Japan, and was focused on Yonaguni Jima, which was estimated at over 131 feet high, could have sealed the fate and destroyed the ancient civilization that once had thrived here. There is no scientific evidence that the ruins found are man-made but many now believe that the Yonaguni Monument and a city over 10,000 years ago once existed before falling into the sea.
https://sharmarama.wordpress.com/2015/03/06/underwater-city-at-yonaguni-japan-the-search-continues/