The Kanayama Megaliths and Archaeoastronomy in Japan@
The Ancient Solar Calendar
Relations with the Sun's Track The Megaliths with a Marked Stone Midsummer



i1jThe Light of the Sun Rising from the Mountain

Around the summer solstice, the light of the sun rising from the mountain comes through Stones B and C illuminates brightly the inner space underneath the Marked Stone (Stone A).


Related point of
gMain Observation Spot
Ah

The space that emerged by the 2003 excavation (Width of entrance: about 2m / Depth: about 5m)



SUNBEAM CYCLE 3
i2jThe Light of the Southing Sun

Around 13:00@
Spotlight-like Sunbeam
Extension of Investigation
(SUNBEAM@CYCLE3)
Observation of 60 days in Midsummer


Around the summer solstice, the light of the southing sun illuminates the grotto underneath the Markings as a spotlight-like sunbeam.

Related point of gMain Observation Spot @h

The grotto underneath the Markings that emerged by the 2002 excavation (Width: about 4m / Depth: about 2m)


We can also know in detail here, like gThe Megaliths of the Iwaya-Iwakage Remainsh, the points on which the spotlight-like sunbeam illuminates and the time length of it.


Around 11:40@

Spotlight-like Sunbeam
The Similarity between the Markings on Stone Face and the Shape of Sunbeam
EAt around 11:40 on 9th July 2004, we observed that the shape of the spotlight-like sunbeam illuminates the grotto was the same as gthe ellipseh marked on the stone face.
E
Then the shape of the sunbeam gradually diminishes thereafter and became identical to the other two small markings, on 5 days after (7/14) and 6 days after (7/15) respectively.


(This observation became possible after we removed the roots of surrounding trees where the spotlight-like sunbeam illuminates, after the summer solstice of 2004.)


The shape of the spotlight-like sunbeam

The shape of the sunbeams and the markings are identical (composite photograph)

The three markings on the stone face

Data by [Stella Navigator]
i3jThe Light of the Sun Setting on the Mountain

Around the summer solstice, the light of the sun comes through the deep ditch below the Markings.

Length of the ditch:
about 5m

Depth of the ditch:
about 50cm

2 meters below the Markings, there is a deep ditch parallel to the Markings, and the sunbeam comes through the ditch at about @15:00 around the summer solstice.
(The result of the 2001 observation)


Discussion on
gThe Observation Results of i1ji2ji3jh
EThe arrangement and the shape of each stone is made so as only the light of the northernmost track of the sun around the summer solstice to illuminate the grotto.
ESo the ellipse and the markings on the stone can be gmarks (signs)h which were curved by the ancient people when they were observing the sun at this place.



i1jThe Light of the Sun Rising from the Mountain

The light of the sun rising from the mountain illuminates the space beneath the Marked Stone (Stone A) during 120 days in midsummer.

EThe light of the sun rising from the mountain, comes through Stones B and C, makes the shadow of Stone C on the gscreenh of Stone A.  
EWith relation to this, the sunlight starts to illuminate the space about 60 days before the summer solstice and ceases to illuminate it about 60 days after the summer solstice.


i3jThe Light of the Sun Setting on the Mountain
The light of the sun setting on the mountain illuminates the space beneath the Markings during 120 days in midsummer.


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