Fossil elasmobranchs from the Pleistocene Shimosa Group, central Japan. [in Japanese, with English abstract] Bulletin of the Mizunami Fossil Museum, 21, 47–56
Carcharodon carcharias (Linné) - shark teeth - from the Pliocene Na-arai formation, Coshi Peninsula, environs of Tokyo, Japan. [in Japanese, with English abstract] Bulletin of the Mizunami Fossil Museum, 2, 91–102