The first discovery of a fossil tooth belonging to the shark genus Heptranchias, with a new Pristiophorus spine, both from the Oligocene of Japan. Bulletin of the National Science Museum, Ser. C (Geol. & Paleont.), 11 (2): 195–200, 1 fig., pl. 1.
Fossil Chondrichthyes of Japan. Journal of the Geological Society of Japan, 78 (11): 585–600
On Cretaceous and Tertiary Fish Remains from the Hidaka and Yubari Districts in Hokkaido, Japan. [in Japanese] Memoirs of the National Science Museum, 5: 223–225
Late Mesozoic and Cenozoic fish faunas of Japan. Island Arc, 3 (4): 255–269