- Ando, H., Tomosugi, T. and Kanakubo, T., 2001:
- Upper Cretaceous to Paleocene Hakobuchi group, Nakatonbetsu area, northern Hokkaido — lithostratigraphy and megafossil biostratigraphy —.
- Journal of the Geological Society of Japan, vol. 107, no. 2, pp. 142–162, pls. 1–2. (in Japanese)
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- Kosuge, T., 2001:
- Records of Septaria (Navicella) lineata (Mollusca, Gastropoda, Neritidae) in the Yaeyama islands, southern Japan.
- Nanki-Seibutsu, vol. 43, no. 1, pp. 55–57. (in Japanese)
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- Kulicki, C., Tanabe, K., Landman, N. H. and Mapes, R. H., 2001:
- Dorsal shell wall in ammonoids.
- Acta Palaeontologica Polonica, vol. 46, no. 1, pp. 23–42.
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- Niko, S., 2001:
- Middle Carboniferous orthoconic cephalopods from the Omi limestone group, central Japan.
- Paleontological Research, vol. 5, no. 2, pp. 115–120.
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- Saito, M. and Endo, K., 2001:
- Molecular phylogeny and morphological evolution of laqueoid brachiopods.
- Paleontological Research, vol. 5, no. 2, pp. 87–100.
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- Sasaki, T., 2001:
- Macro- and microstructure of shell and operculum in two Recent gastropod species, Nerita (Theliostyla) albicilla and Cinnalepeta pulchella (Neritopsina: Neritoidea).
- Paleontological Research, vol. 5, no. 1, pp. 21–31.
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- Tanabe, K., Kulicki, C., Landman, N. H. and Mapes, R. H., 2001:
- External features of embryonic and early postembryonic shells of a Carboniferous goniatite Vidrioceras from Kansas.
- Paleontological Research, vol. 5, no. 1, pp. 13–19.
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- Fukada, A., 2002:
- Additional notes on the Jurassic system of Ozika peninsula, southern Kitakami mountain land, Japan.
- Annual Report, Fukada Geological Institute, no. 3, pp. 79–99, pls. 1–3. (in Japanese)
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- Kosuge, T. and Sasaki, T., 2002:
- Habitat and geographic distribution of an unidentified species of Patelloida profunda group new to Japan (Patellogastropoda: Lottiidae).
- Chiribotan, vol. 33, nos. 1–4, pp. 47–52. (in Japanese)
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- Niko, S., 2002a:
- Revision of an Ordovician cephalopod Ormoceras yokoyamai (Kobayashi, 1927).
- Paleontological Research, vol. 6, no. 1, pp. 121–124.
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- Niko, S., 2002b:
- Echigoceras sasakii, a new Middle Carboniferous nautilid from the Omi limestone group, central Japan.
- Paleontological Research, vol. 6, no. 4, pp. 351–355.
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- Niko, S. and Ehiro, M., 2002:
- Permian orthoconic cephalopods of the Ochiai formation in the southern Kitakami mountains, northeast Japan.
- Paleontological Research, vol. 6, no. 4, pp. 385–389.
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- Saito, M. and Tazawa, J., 2002:
- Hemithiris woodwardi (A. Adams) (Rhynchonellida, Brachiopoda) from the Pleistocene Shichiba formation, Sado island, central Japan.
- Science reports of Niigata University. Series E, (Geology), no. 17, pp. 7–15.
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- Sasaki, T., 2002:
- A Natural history of shells., pp. 1–194, pls. 1–16. The University Museum, The University of Tokyo. (in Japanese)
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- Smith, R. J., Matzke-Karasz, R., Kamiya, T. and Ikeda, Y., 2002:
- Scottia birigida sp. nov. (Cypridoidea: Ostracoda) from western Honshu, Japan and a key to the subfamily Scottiinae Bronstein, 1947.
- Zootaxa, no. 126, pp. 1–20.
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