The Yonaguni Monument is an underwater rock formation off the coast of Yonaguni Island, Japan. Discovered in 1986 by a local diver named Kihachiro Aratake, the monument has sparked debate over whether it is a natural geological formation or the ruins of an ancient civilization.
Discovery and Location
- Found in 1986 by Kihachiro Aratake while diving near Yonaguni Island, part of the Ryukyu Islands in Japan.
- Located about 25 meters (82 feet) underwater near the southern coast of Yonaguni.
- The main structure is approximately 150 meters long, 40 meters wide, and 27 meters high.
Geological vs. Man-Made Debate
1. Natural Formation Theory
Many geologists believe the monument is a natural formation, shaped by tectonic activity, erosion, and ocean currents.
- The sandstone and mudstone structure is consistent with natural formations in the area.
- Joint fractures (natural cracks in rock layers) can create the appearance of steps and terraces over time.
- Marine erosion from waves and currents may have shaped the monument’s features.
Key Supporters:
- Masaki Kimura, a marine geologist, initially suggested it was an ancient structure but later acknowledged natural causes might be involved.
- Robert Schoch, a geologist from Boston University, argues that the features resemble natural formations found elsewhere.
2. Lost Civilization Theory
Some researchers believe the Yonaguni Monument was built by an ancient civilization that existed 10,000–12,000 years ago, possibly during the last Ice Age when sea levels were lower.
- The structure has stair-like terraces, flat surfaces, sharp edges, and pillar-like formations that suggest human modification.
- Some divers claim to have found carvings and symbols resembling early writing or artwork.
- The site may have been part of a larger sunken city or connected to ancient civilizations like the Jomon culture of Japan.
Key Supporters:
- Graham Hancock, an author and journalist, argues that Yonaguni is evidence of a lost advanced civilization.
- Masaaki Kimura, a marine geologist, suggested it could be part of an ancient city destroyed by an earthquake around 2,000 years ago.
Notable Features
- Terraces & Platforms – Resembling step pyramids or plazas.
- Staircases & Roads – Flat, rectangular sections resembling walkways.
- The “Main Monument” – A large, flat-topped structure with sharp edges.
- The “Turtle Formation” – A rock resembling a carved turtle.
- Possible Inscriptions – Some divers claim to have found engravings or markings.
Modern Exploration & Tourism
- The site is a popular scuba diving location, attracting tourists and researchers.
- Ongoing studies have not reached a definitive conclusion, and the debate continues.
- The Japanese government does not officially recognize it as an archaeological site due to lack of evidence of human construction.
Conclusion
The Yonaguni Monument remains one of the most mysterious underwater formations in the world. Whether it is an ancient city lost to rising seas or simply a stunning natural rock formation, its unique structure continues to intrigue divers, scientists, and history enthusiasts alike.