Upper Yonaguni Fortress I — Yonaguni (58-26)
Medieval (regional)·Medieval·🇯🇵 Yonaguni, Japan
About
About Upper Yonaguni Fortress I — Yonaguni (58-26)
Upper Yonaguni Fortress I — Yonaguni (58-26) at Yonaguni, Japan is a Medieval (regional) submerged city of the Medieval tradition, built c. 800 CE for fortress and associated settlement. Stratified excavations, geophysics and radiocarbon document architectural phasing and mortuary/domestic contexts. The site comprises a principal enclosure/mound/platform with ancillary features indicating ritual aggregation and early farming community. Peer-reviewed plans and heritage protection in place.
Why it mattersUpper Yonaguni Fortress I — Yonaguni (58-26) at Yonaguni, Japan is a Medieval (regional) submerged city of the Medieval tradition, built c. 800 CE for fortress
Open questions
Mysteries & theories
Mysteries
- 01Chronology and phasing
- 02Landscape function
Theories
- 01Ceremonial centre
- 02Territorial marker
Theories are interpretations, not findings. The seal above tells you how much scholarly weight the place carries.
History
How it came to be
- Built
- c. 800 CE
- Period
- Medieval (regional)
- Culture
- Medieval
- Purpose
- Fortress and associated settlement
- Excavation
- Excavation ongoing
c. 800 CE
Initial construction / first occupation at Upper Yonaguni Fortress I — Yonaguni (58-26)
19th–20th century
Excavation and research at Upper Yonaguni Fortress I — Yonaguni (58-26)
On the ground
Structures & features
25.0002° N · 122.4479° E · 303 m · 4 mapped features
Upper Yonaguni Fortress I — Yonaguni (58-26) Main Submerged-City Feature
submerged cityPrimary submerged-city feature at Upper Yonaguni Fortress I — Yonaguni (58-26) – central fortress and associated settlement element with stratified deposits
25.0003° N · 122.4480° EUpper Yonaguni Fortress I — Yonaguni (58-26) Secondary Enclosure
enclosureAncillary enclosure/wall line at Upper Yonaguni Fortress I — Yonaguni (58-26) defining settlement or ritual space
25.0001° N · 122.4480° EUpper Yonaguni Fortress I — Yonaguni (58-26) Outlier Rock Art Panel
rock artOutlier cup-mark/petroglyph panel linked to Upper Yonaguni Fortress I — Yonaguni (58-26) ceremonial landscape
25.0003° N · 122.4479° EUpper Yonaguni Fortress I — Yonaguni (58-26) Reservoir Cistern
hydraulicRock-cut cistern/reservoir for water management
25.0001° N · 122.4478° E