Tag Archives: North Star

May 21 at Senkoku-ishi


May 21 (Sun) First day of dashed line of light

Chunichi Shimbun reported the event.  Compared with yesterday, May 20th, we could clearly see four dashes of light today. We were interviewed by reporter Matsumoto from Chunichi Shimbun. It is the spotlight observation in Senkoku-ishi that takes place around 1 pm, thirty days before the summer solstice. The WEB NEWS is here Chubu Chunichi Shimbun (Hida) May 24, 2017. The visitors today were mainly from outside the prefecture. They began gathering at 12:30 pm.


And at night we lit the Big Dipper cup-marks. We were worried there might be clouds, but fortunately we could see the starry sky. Visitors from the prefecture arrived at 7:30 pm.


We could see the Big Dipper lying above us. Can you see it at the top of this photo? And low in the sky, Polaris sits above the megalithic group. This may be somewhat difficult to see but it is surely there in the photograph.

The Polar Star and the Big Dipper are far apart now, but about 5000 years ago they were closer. In other words, the North Star rotated around nearer the megaliths.

And when you connect seven of the nine cup-marks engraved on the megalith, the shape of the Big Dipper emerges. Isn’t it fantastic!

As you can see the picture above, the shapes of the actual Big Dipper and the stone cup-marks are mirror images. We do not know why this is so, but ancient people, in ruins around the world, also have inverted the shapes in the same way. And as to what the other two cup-marks mean … It seems that we contemporary people do not have any explanation.



Most of the universe is unknown. Modern people have only a small amount of information of the whole, and there is no way we can even deny the possibilities of ancient times. In this sense, the Kanayama megalithic group can be said to be an instrument that not only measures time but also can measure the thinking power of people.

In any case … the enjoyment of the starry sky finished around 9:30 pm. We are considering starry sky viewing once more this summer, with the solar observation society in July or August. Next time, the Big Dipper will not be seen as it will be hidden behind a tree, but we want to do a cup-mark lighting. We want to watch the Amanogawa Milky Way and the Summer Triangle (of the stars Altair, Deneb, and Vega). We hope to share our passion with many of you.