noun
horizontal stone chamber; corridor-type stone burial chamber
Archaeological term for a type of stone burial chamber used in ancient Japanese tumuli (kofun), entered from the side rather than the top.
この古墳には横穴式石室が設けられている。
This ancient tomb is equipped with a horizontal stone chamber.
横穴式石室は、古墳時代後期に多く見られる。
Horizontal stone chambers are often seen in the late Kofun period.