🇯🇵 Japan · Megalith
Oshoro
Jomon Mid–Late 2500–1800 BCE (Hokkaido) · Jomon Hokkaido (Oshima–Shakotan)
Hokkaido Jomon stone circle (2500–1800 BCE) at Oshoro Otaru — 30 m with 47 boulders and Fusen rock art above Oshoro Bay.
🇯🇵 Japan · Megalith
Kiusu Earthwork Burial Circles
Final Jomon 1200–800 BCE · Jomon Final Hokkaido
Late Jomon collective burial banked circles (1200–800 BCE) on terrace above Ushiku River at Chitose — 9 embanked circular enclosures diameter 12–75 m built of external ditch and internal bank housing…