PROHIBITED constructions of Japan

Throughout the world there are all kinds of structures and impressive monuments that recorded the ancient civilizations.
On this occasion, we talked about one of the most mysterious ancient buildings in Japan. Kofun burial mounds have different forms. The oldest of them is semicircular, but they also look rectangular and square; Although the most common and surprising of all these types is the keyhole.
What do these strange structures hide?
#Mysteries # Japan
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