A new species of fossil dolphin from the Miocene deposits of Kabato Mountainland, Hokkaido, Japan - 1977
On a new fossil sea-lion from the Uonuma Group (Plio-Pleistocene), Ojiya, Niigata Prefecture, Central Japan - 1981
Three fossil marine mammals from the Neogene of Sakiyama Peninsula, Ishikawa Prefecture, Central Japan - 1986