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| Tanaka, N. & T. Yukawa, 2008. Eria carinata (Orchidaceae), newly recorded from the Malay Peninsula. Acta Phytotaxonomica et Geobotanica, 59, 179-181. |
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| Yukawa, T. & N. Tanaka, 2008. Cymbidium ×nomachianum (Orchidaceae) - a new natural hybrid from Japan. Bulletin of the National Museum of Nature and Science Series B (Botany), 34, 83-87. |
| Ogura-Tsujita, Y. and T. Yukawa, 2008. Epipactis helleborine shows strong mycorrhizal preference towards ectomycorrhizal fungi with contrasting geographic distributions in Japan. Mycorrhiza 18, 331–338. |
| Ogura-Tsujita, Y. & T. Yukawa, 2008. In situ seed sowing techniques for the recovery of endangered orchids. Japanese Journal of Conservation Ecology, 13, 121-127. |
| Tsutsumi, C., T. Yukawa, N. S. Lee, C. S. Lee and M. Kato, 2008. Liparis purpureovittata (Orchidaceae) – a new species from Japan. Acta Phytotaxonomica et Geobotanica, 59, 73-77. |
| Motomura, H., T. Yukawa, O. Ueno & A. Kagawa 2008. The occurrence of crassulacean acid metabolism in Cymbidium (Orchidaceae) and its ecological and evolutionary implications. Journal of Plant Research, 121, 163-177. |
Sang, M. E., T. Yukawa, Y. Luo, J. V. Freudenstein and N. S. Lee 2008. Reappraisal of Diplolabellum coreanum (Orchidaceae): inferred from molecular data. Journal of Plant Biology, 51, 20-24.
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| Ogura-Tsujita, Y. & T. Yukawa 2008. High mycorrhizal specificity in a widespread mycoheterotrophic plant, Eulophia zollingeri (Orchidaceae). American Journal of Botany, 95, 93-97. |
