

Megaliths in the Area
I would like to show some photos from our field trip to several megalithic sites in the south of Gifu Prefecture in May 2019.
Based on the experience of twenty years of research on the Kanayama megaliths and the Jomon solar calendar, Yoshiki Kobayashi and Shiho Tokuda had established a theory about a possible system of megaliths designed and built by the Jomon people thousands of years ago to determine a solar calendar.
I have translated parts of their report The Kanayama Megaliths and Funa Iwa Solar Observation System of Gifu Prefecture , Kobayashi Y. and Tokuda S. J. Astro. Archaeol. Soc. Japan, Vol. 1, No. 1, 1-9, 2019 (in Japanese). and published in two parts on the Iwakage site: Part 1 , Part 2 . This post is the third part of this series.
The sites visited are all located in southern Gifu Prefecture, south-east of the Kanayama Megaliths . Together with Kobayashi Yoshiki and Tokuda Shiho, the program director of the TIFO Japan-Insights project – Mr. Shirai Makoto, Ms. Funabashi Kikuko, and Mr. Sugisaka Kazuo we started from Maruyama Jinja, and then went on to visit the sites in Sengeyama and Kasagiyama.

Not far northeast of Maruyama Jinja is Sengeyama, with a blue arrow indicating the direction of sunrise of the summer solstice.
At the top center is the site of the Iwayama megaliths, with a blue arrow indicating the direction of sunrise of the equinox.
Kasagiyama is located about 12 km west of Maruyama Jinja, where blue arrows indicate the equinox and winter sunrise directions.
Note also the many archaeological sites in Jomon, which are marked with red dots.
Maruyama Jinja
This shrine is located on a 330m high hill in a village in the middle of an agricultural plain, surrounded by mountains in the distance.





Sengeyama
Next we drove to Sengeyama, which is quite close to Maruyama. This mountain is covered with loose volcanic rock which makes climbing difficult. I decided to wait and gave my camera to Shirai san who then took the following picture.

Kasagiyama
Kasagiyama is a sacred mountain of 1,137m height, 12 km west of Maruyama Jinja.




The photos shown are snapshots from our trip. They are not meant to document a scientific investigation – which it really was; rather, they are meant to complement the photos that Tokuda Shiho presented in her journal paper mentioned at the beginning.
Special thanks go to Tokuda Shiho for sharing her map
Learn more about the Kanayame Megaliths by reading Harriet Natsuyama's article Jomon Astronomy, the Solar Calendar of the Kanayama Megaliths . at Japan-Insights.jp!