Laboratory, Nature Fieldwork Center, Okayama University of Science (since April 2019)
Research: The Sino-Japanese floristic region, including the flora of Japan, exhibits high plant diversity. Our primary research focus is to understand the diversification and evolution of plants in this region. To achieve this, we conduct fieldwork, morphological observations, ploidy analysis, and molecular phylogenetic analysis, considering different geographical scales and evolutionary status.
Our reserch centers around endemic plant groups in this region, such as Aucuba, Helwingia, Pertya, and Gardneria, plant groups diversified in this region, such as Aristolochia and Cleyera We also study plant groups including endemics in the Ogasawara Islands (Pittosporum and Leptopetalum), and in the Atetsu region around Okayama (Gardneria multiflora, etc.).
Furthermore, we investigate historical herbarium specimens and address nomenclatural problems.
Plant Names published by Ohi-Toma:
Agapetes oxycoccoides J.Murata, Nob.Tanaka & Ohi-Toma, J. Jap. Bot. 91(Suppl.): 104 (2016).
Aristolochia kachinensis Ohi-Toma, Nob.Tanaka & J.Murata, J. Jap. Bot. 96(6): 316 (2021).
Aristolochia kaempferi var. laevipes Watan.-Toma & Ohi-Toma, Acta Phytotax. Geobot. 72(3): 283 (2021).
Aristolochia vestita Ohi-Toma, P.Li & Watan.-Toma, J. Jap. Bot. 96(5): 256 (2021).
Aristolochia tanzawana (Kigawa) Watan.-Toma & Ohi-Toma, J. Jap. Bot. 89(3): 160 (2014).
Leptopetalum coreanum (H.Lév.) Naiki & Ohi-Toma, J. Jap. Bot. 95(3): 149 (2020).
Leptopetalum coreanum var. luxurians (Hatus.) Naiki & Ohi-Toma, J. Jap. Bot. 95(3): 150 (2020).
Leptopetalum strigulosum var. luxurians (Hatus.) Naiki & Ohi-Toma, J. Jap. Bot. 91(6): 342 (2016).
Leptopetalum pachyphyllum (Tuyama) Naiki & Ohi-Toma, J. Jap. Bot. 91(6): 342 (2016).
Diversiarum J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011). [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Diversiarum alpinum (C.Y.Wu ex H.Li, Y.Shiao & S.L.Tseng) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011). [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Diversiarum diversifolium (Wall. ex Schott) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Hirsutiarum J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Hirsutiarum brevipilosum (Hett. & Sizemore) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Hirsutiarum hirsutum (S.Y.Hu) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Hirsutiarum meghalayense (D.K.Roy, Talukdar, B.K.Sinha & Dutta Choud.) J.Murata & Ohi-Toma, J. Jap. Bot. 95(5): 289 (2020).
Hirsutiarum nangkarense (Nangkar & Tag) J.Murata & Ohi-Toma, J. Jap. Bot. 95(5): 289 (2020).
Hirsutiarum tentaculatum (Hett.) J.Murata & Ohi-Toma, J. Jap. Bot. 95(5): 289 (2020).
Pedatyphonium J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [ Syst. Bot. 35(2): 249 (2010), nom. inval.].
Pedatyphonium calcicola (C.Y.Wu ex H.Li, Y.Shiao & S.L.Tseng) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Pedatyphonium horsfieldii (Miq.) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Pedatyphonium kunmingense (H.Li) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Pedatyphonium larsenii (S.Y.Hu) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Pedatyphonium omeiense (H.Li) J.Murata & Ohi-Toma, Syst. Bot. 36(1): 254 (2011) [Syst. Bot. 35(2): 249 (2010), nom. inval.].
Sauromatum giganteum (Engl.) J.Murata & Ohi-Toma, Syst. Bot. 35(2): 249 (2010).
Vincetoxicum acuminatifolium (Hemsl.) Ohi-Toma & K.Mochizuki, J. Jap. Bot. 98(6): 324-327 (2023).