Japan Megalithic Sites Photo Gallery Click any image to enlarge. Oshoro Stone Ring, Otaru, Hokkaido Island Ishi no Hoden, Oshiko Jinja Shinto Shrine at entrance to megalithic site, Takasago Ishi no Hoden, Takasago Ishi no Hoden, Takasago Ishi no Hoden, Takasago Ishi no Hoden, Takasago Ishibutai Kofun, Asuka Ishibutai Kofun, Asuka Ishibutai Kofun, Asuka Ishibutai Kofun, Asuka Ishibutai Kofun, Asuka Masuda Iwafune, Asuka Masuda Iwafune, Asuka Mail