Sakayama, H, Shimizu, M, Higa, A. Taxonomy, morphology, and phylogenetic placement of a new species, Nitella pluripapillifera sp. nov. (Charales, Streptophyta), from Japan. Phycologia. 2024. in press
Sakayama, H, Omori, Y, Nozaki, H, Kato, S, Kamiya, K, Watanabe, M. Taxonomy, new distribution, and DNA barcoding of the rare alga Chara altaica (Charales, Charophyceae) in Japan. Journal of Asia-Pacific Biodiversity. 2024. in press
Sakayama, H, Akai, N, Kamiya, K. New distribution and DNA barcoding of the endangered alga Lamprothamnium succinctum (Charales, Charophyceae) in Tottori Prefecture, Japan. The Journal of Japanese Botany. 2023. 98. 247-253
Tomoyuki Takano, Hisato Ikegaya, Kenichi Ikeda, Hisayoshi Nozaki, Hidetoshi Sakayama. Morphology, taxonomy and phylogenetic positions of two Spirogyra species (Zygnematophyceae, Streptophyta) with replicate and semi-replicate transverse walls from Japan. Phycologia. 2022. 61. 4. 425-435