In addition to the artifacts from a variety of ancient eras including the Jomon, Yayoi, and Kofun (Tumulus) periods, the most numerous are kyozuka (sutra mound) relics, epitaphs, and other items dating from after the beginning of written history.
縄文時代・弥生時代・古墳時代の各時代の出土品のほか、経塚遺物や墓誌など歴史時代に入ってからのものも多い。