Maeda, S. 1962. On the occurrence of Nippononaia in the Late Mesozoic Tetori Group. Transactions and Proceedings of the Palaeontological Society of Japan 46: 243-248. http://www.palaeo-soc-japan.jp/download/TPPSJ/TPPSJ_NS46.pdf.
(error for Nippononaia Suzuki, 1941)
Maeda, 1962. Trans. Proc. Palaenot. Soc. Japan 46: 248.
Type species: Unio (Nippononaia) ryosekiana Suzuki, 1941 = Nippononaia ryosekiana