Iwaya-Iwakage,our sister site, has just posted a series of articles that begins:
Birth of Hida Kuni Jomon Dynasty
The land of Hida, where the Kanayama Megaliths are located, may not be so well known historically as other parts of the country such as Kyoto and Nara. And yet its history stems from the Jomon Period, 12,000 BCE to 300 BCE. In the article presented below, the unnamed author declares that there are many folkloric sources that reveal the possibility that Hida was the place where civilization began, ultimately leading to the modern nation of Japan.