Leap-year observations on October 13 and 14, 2015

Did you know that 2015 is a leap-year observation year?

At Kanayama Megaliths, leap-year observations are made in the month of October. In a normal year, a spotlight strikes the leap-year measuring stone (stone b in the above poster) for a few days up to and including October 14. For an upcoming leap year, the spotlight can be observed even on October 15. 2015 is such a year for the October 15 observation.

October 13, 2015

We were anxious to see the spotlight on the leap-year measuring stone this October. We were concerned when we had a sequence of rainy days. Finally, when October 13 turned out to be a fairly sunny day, we ventured into Iwaya-Iwakage to look. Here is what we saw.

The sunbeam has entered the chamber. The spotlight on the measuring stone does not strike the tip of the stone. The spotlight is rather diffuse due to the hazy sunlight.

October 14, 2015

We returned the following day to observe the movement of the spotlight. The day dawned crisp and clear. The spotlight was also crisp and clear, but it did not reach the tip that day. The view through the “window” shows the head of the megalith which shapes the spotlight. We end this day’s post with a shot of Yoshiki Kobayashi and spotlight.

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