Yamaguchi Yonaguni Second Terrace – Sanninudai Extended Claim
Yamaguchi Yonaguni · Sanninudai second terrace · Yonaguni second claim · Yonaguni Kaitei 2
Pseudoarchaeology 1992– claim (proposed 10,000 BCE Atlantis Mu)·Kimura Atlantis/Mu school·🇯🇵 Okinawa, Yonaguni Island, Sanninudai coast secondary, Japan
About
About Yamaguchi Yonaguni Second Terrace – Sanninudai Extended Claim
Marine geologist Masaaki Kimura 1992 extrapolated after first Yonaguni main terrace (24°26′02″N 122°59′46″E) a second site 'Sanninudai central castle' 2 km west with 'stairways, moat, podium' at –15 m claimed Atlantis Mu leaning tower. Robert Schoch 2000, Yokose, and JAMSTEC Katase Kagoshima Univ. 2003 multibeam and ROV 2003–06 show massive field of bedded Ryukyu Group calcarenite sandstone with orthogonal joint sets naturally fracturing into stepped terraces; no ceramics. Sanninudai exposure is sea-stack lens, not ashlar, with intertidal rock pools that resemble basins.
Why it mattersSecond-site extrapolation after primary refutation — moving goalpost to new bay when main yields no cultural layers.
Open questions
Mysteries & theories
Mysteries
- 01Why no cultural layer or stone tool even at intertidal where cist tombs occur?
- 02Is Sanninudai joint azimuth same as main monument 120°?
Theories
- 01Schoch measured joint azimuth 330/060 identical to main — natural regional tectonic joint, not cut
- 02Sea-stack top is at present sea-level indicating zero subsidence since 8 kya — cannot have drowned castle
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- 1992 press 'Yonaguni second monument'
- Period
- Pseudoarchaeology 1992– claim (proposed 10,000 BCE Atlantis Mu)
- Culture
- Kimura Atlantis/Mu school
- Purpose
- Second Mu castle before 10,000 BCE
- Abandoned
- Never built — natural fractured sandstone
- Rediscovered
- 1992 announcement; no peer peer-review
- Excavation
- Not applicable
1992
Kimura claims Second terrace Sanninudai at Yonaguni west coast
2000
Robert Schoch joint-system paper: orthogonal joints make steps naturally
2003–06
JAMSTEC Kagoshima U. ROV maps fractured lens — no tools
2005
French team Yokose geomorphology review concludes wave erosion
Modern
Kimura still cites second site in Mu Atlantis books 2008–18
On the ground
Structures & features
24.4445° N · 122.9495° E · -15 m · 3 mapped features
Second terrace claim Sanninudai
pseudoClaimed 'castle' at 24.4445N 122.9495E –15 m
24.4445° N · 122.9495° EMain Yonaguni monument real
naturalMain terraced sandstone 24.4339N 122.9989E natural fracture (already in database)
24.4339° N · 122.9989° ESea-stack lens natural
naturalCollapsed lens at Sanninudai intertidal
24.4450° N · 122.9510° E
Gallery