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Preparation of Carcharodon megalodon tooth set from Kitaibaraki City, Ibaraki Prefecture, Japan. Bulletin of the Ibaraki Nature Museum, 11, 63–68
Carcharodon megalodon tooth set collected from calcareous concretions in the Miocene Kokozura Formation, Takaku Group, Kitaibaraki city, Ibaraki Prefecture, Japan. Palaeontological Society of Japan, 81, 1–2
Tertiary elasmobranchs from Futatsunuma, Hirono-cho, Fukushima Prefecture, Japan. In Taira Geology Club(ed), Special Publication of Taira Geological Society: 67–75