noun
keyhole-shaped ancient Japanese tumulus
Technical term in archaeology for a distinctively shaped burial mound from the Kofun period, with a square front and round back.
前方後円墳は古墳時代を代表する墳墓の形です。
The keyhole-shaped tumulus is a representative tomb form of the Kofun period.
この地域には多くの前方後円墳が残っている。
Many keyhole-shaped tumuli remain in this region.