Koso Kotai Jingu in Ibaraki, from http://www.kousokoutaijingu.or.jp/
In the Part 4 post, https://iwakage.wordpress.com/2016/06/24/308/, the history of Hida in the 竹内文書 Takenouchi documents was not presented.竹内 can be read Takenouchi or Takeuchi. We now give a brief summary of pertinent points from that part of the source article, http://www.geocities.jp/mb1527/N3-01-1hidakoku.html.
History of Hida Takaamahara According to Takenouchi Documents
There was a coup d’etat during the reign of Emperor Buretsu. He was forced to hand over documents conveying the tradition of ancient Japan. To protect this literature, he secretly allowed it to go to Etchu Toyama. The old documents were transmitted to the Koso Kotai Jingu there, whose descendants are the house of Takeuchi. The ancient documents are written in jindai moji, script of the age of kami. They referred to the documents as 「御神宝」sacred treasure. Collectively the documents are the 竹内文書 Takenouchi documents or the Takenouchi literature.
There was a government trial during the time of World War II in which documents were submitted. Although there was acquittal, the submitted documents were not returned immediately and originals were destroyed by air raids.
In the Takenouchi literature, prior to Emperor Jimmu there were 72 generations of Sumera Mikoto. An ultra-ancient Japanese archipelago was the center of politics and culture in the world. And the center of it was a governance headquarters of the Hida-Norikura Takaamahara around the Jinzugawa in Toyama.