Tessellated calcified cartilage and placoid scales of the Neogene megatooth shark, Otodus megalodon (Lamniformes: Otodontidae), offer new insights into its biology and the evolution of regional endothermy and gigantism in the otodontid clade. Historical Biology, in press
DOI: 10.1080/08912963.2023.2211597
New occurrence of Acrodus (Hybodontiformes; Chondrichthyes) fossil from the Ishido Formation (Lower Cretaceous) of the Sanchu Group, Kanna Town, Gunma, Japan Bulletin of Gunma Museum of Natural History, 26, 55–62
Fossil sharks from the lower Pleistocene Komiya Formation, Kazusa Group, Tokyo, Japan: The teeth associated with the skeleton of Eschrichtius akishimaensis. Bulletin of Gunma Museum of Natural History, 25, 49–58
Research on fossil Chondrichthyes in Japan: Current status and future. Fossils, 109, 5–17
The first occurrence of fossil sharpnose sevengill shark (Heptranchias; Hexanchiformes) from the Eocene Sakasegawa Formation, Amakusa, Kumamoto, Japan. Bulletin of Gunma Museum of Natural History, 24, 25–30
Elasmobranch fossils from the lower Miocene Akeyo Formation, Mizunami Group at the construction site of Mizunami-Kita Junior High School in Mizunami City, Gifu, Japan. [Japanese with English abstract] Bulletin of the Mizunami Fossil Museum, 44, Special Volume(2018), 39–42
Elasmobranch remains from the Upper Cretaceous Ashizawa Formation (Coniacian), Futaba Group, in Hirono Town, Fukushima Prefecture, Japan. [Japanese with English abstract] Bulletin of Gunma Museum of Natural History, 22, 59–66
New fossil record of the genus Echinorhinus (Chondrichthyes, Echinorhiniformes) from the Turonian of northwestern Pacific area. [Japanese with English abstract] Bulletin of Gunma Museum of Natural History, 22, 67–71
On the shark tooth remains, collected by natural historian Shosaku IWASAWA -focuses of Tenjinyama Specimen. Bulletin of Gunma Museum of Natural History, 19, 55–61
On a shark tooth remain, collected in the Gunma Safari Park, Tomioka City, Gunma Prefecture, central Japan. Bulletin of Gunma Museum of Natural History, 19, 63–67
A dense occurrence of teeth of fossil "mako" shark ("Isurus" hastalis: Chondrichthyes, Lamniformes), associated with a balaenopterid-whale skeleton of the Late Miocene Pisco Formation, Peru, South America. Bulletin of Gunma Museum of Natural History, 18, 77–86
Discovery of the teeth remains Parotodus benedeni from the Oligocene Ashiya Group in the Hikoshima Nishiyama Area, Shimonoseki City, Yamaguchi Prefecture, Southwest Japan. Bulletin of the Yamaguchi Museum, 40, 9–20
New occurrence of ctenacanthid sharks from the Permian of the Ashio tenctonic belt, Kiryu City, Gunma Prefecture, central Japan. Bulletin of Gunma Museum of Natural History, 15, 153–159
New occurrence of Acrodontid shark (Chondrichthyes) from the Lower Jurassic Iwamuro Formation in Numata City, Gunma Prefecture, central Japan. Bulletin of Gunma Museum of Natural History, 15, 147–152
Outline of fossil elasmobranchs from the Middle Miocene Bessho and Aoki Formations, Nagano Prefecture, Japan. [in Japanese with English abstract] Research Report of the Shinshushinmachi Fossil Museum, 13, 7–18
A deep-sea shark assemblage from the Miocene in southwest of Gunma Prefecture, central Japan and the biogeographical significance. Palaeontological Society of Japan, 81, 24–44
Tooth remains of Chlamydoselachus (Chondrichthyes, Elasmobranchii) from the Tomioka Group (Lower to Middle Miocene) in Tomioka and Annaka City, Gunma Prefecture, Central Japan. Bulletin of Gunma Museum of Natural History, 5, 19–30
