Marine fossils from the Moniwa Formation, distributed along the Natori River, Sendai, Northeast Honshu, Japan. Part 3. Shark teeth from the Moniwa Formation. Saito Ho–on Kai Mus. Res. Bull, 43: 9–26.
A Problematicum from the Tsunakigawa Formation, Yamagata Prefecture, northeast Honshu, Japan. Acta Geologica Taiwanica, 15, 9–12
A sting ray and eagle ray from the Tatsunokuchi Formation (Pliocene) in Sendai city, Miyagi prefecture, Japan. Transactions and Proceedings of the Palaeontological Society of Japan, 57, 34–37
Dasybatus from the Japanese Miocene. Transactions and Proceedings of the Palaeontological Society of Japan, 45, 201–205
