The Kashiya Cave Tombs (柏谷横穴群, Kashiya Yokoana-kofun gun) is an archaeological site containing the ruins of a final Kofun period to early Nara period necropolis in the Kashiya neighborhood of the town of Kannami, Shizuoka in the Tōkai region of Japan. The site was designated a National Historic Site of Japan in 1976, with the area under protection extended in 1998 The site is also popularly known as the Kashiya One Hundred Holes (柏谷の百穴, Kashiya no Hyakuketsu).