Minami Mukaibara : Kofun, hōkei-shūkō bo, jūkyoshi no chosa - Takiguchi, Hiroshi, 1910- (Waseda Univ. Press, 1976)
English abstract: Excavations of Kofun (mounded tombs), Hōkei-shūkō bo (rectangular graves with encircling ditches), and habitation sites.