Octagonal Kofun

are a very rare kind of kofun.

Many Japanese Emperors were buried in them including Empress Kōgyoku in ,
Emperor Tenji in ,
and Emperor Jomei in 

From the end of the 6th century to the beginning of the 7th, the tumuli of the monarchs changed from square hōfun tumuli to octagonal  tumuli.

 List of Octagonal Kofun 















References
Category:Kofun