🇯🇵 Japan · Submerged site
Yonaguni II – Iseki Point South Terrace Pseudo
Pseudoarchaeology (2012–present) · Pseudoarchaeology (Yonaguni secondary)
Yonaguni south terrace second pseudo at 25 m – bedding-plane ledge 500 m south of Monument, no moat.
🇯🇵 Japan · Megalith
Yonaguni Monument
Geological: Early Miocene sandstone (20 Ma) formation; if artificial, claimed Jomon or earlier (10,000–2000 BCE) · Disputed – natural geology vs hypothetical Jomon / lost Pacific civilization
Submerged sandstone formation off Yonaguni Island discovered 1986 featuring stepped terraces up to 27 m high, flat surfaces and apparent right angles at 25–30 m depth, extending ~150×40 m.