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全国に15万基の古墳が残存すると言われている。
そのうち、3世紀半ばから始まる古墳時代の王権を象徴する前方後円墳は、
畿内を中心として各地に5000基を数える。
It is said that 150,000 burial mounds remain nationwide and
5,000 units of keyhole-shaped mounds are located in various places mainly in Kinai.
They symbolize the kingship of the Kofun period and began in the middle of the 3rd century,