| Issue Date | Title | Author(s) | Relation | scopus | WOS | Fulltext/Archive link |
| 2006 | Chromosome number of Lobelia nummularia (Campanulaceae) in Taiwan and the Philippines. | Kokubugata, G.; Peng, C. -I; Madulid, D. A. | Annals of the Tsukuba Botanical Garden 25, 7-10 | | | |
| 2004 | Comparison of karyotypes among three Heloniopsis species (Liliaceae) from Ryukyu Archipelago and Taiwan. | Kokubugata, G.; Peng, C. -I; Yokota, M. | Annals of the Tsukuba Botanical Garden 23, 13-16 | | | |
| 2010 | Evidence of three parallel evolutions of leaf dwarafism and phytogeography in Lysimachia sect. Nummularia in Japan and Taiwan | Kokubugata, G.; Nakamura, K.; Shinohara, W.; Saito, Y.; Peng, C. -I; Yokota, M. | MOLECULAR PHYLOGENETICS AND EVOLUTION 54, 657-663 | | | |
| 2010 | Flavone O- and C-glycosides from Pothos chinensis (Araceae). | Iwashina, T.; Peng, C. -I; Kokubugata, G. | Bulletin of National Museum of National Science 36(1), 27-32 | | | |
| 2004 | Floral morphology and recognition of varieties in conandron ramondioides (gesneriaceae) from Japan and Taiwan | Kokubugata, G.; Peng, C. I. | Edinburgh journal of botany 61, 21-30 | | | |
| 2008 | Folilar flavonoids from two Begonia species in Japan | Iwashina, T.; Saito, Y.; Peng, C. -I; Yokota, M.; Kokubugata, G. | Bull. Natl. Mus. Nat. Sci., Ser. B 34(4), 175-181 | | | |
| 2012 | Molecular phylogeography reveals an antitropical distribution and local diversification of Solenogyne (Asteraceae) in the Ryukyu Archipelago of Japan and Australia | Nakamura, K.; Denda, T.; Kokubugata, G.; Forster, P. I.; Wilson, G.; Peng, C. -I; Yokota, M. | BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY 105, 197-207 | | | |
| 2008 | Notes on Lysimachia sect. Idiophyton (Primulaceae) in the Philippines and Taiwan. | Kokubugata, G.; Madulid, D. A.; Peng, C. -I | Memoirs of the National Science Museum 45, 121-125. | | | |
| 2010 | Phylogeography of Ophiorrhiza japonica (Rubiaceae) in continental islands, the Ryukyu Archipelago, Japan. | Nakamura, K.; Denda, T.; Kokubugata, G.; Suwa, R.; Yang, T. Y. A.; Peng, C-I; Yokota, M. | JOURNAL OF BIOGEOGRAPHY 37, 1907-1918 | | | |
| 2011 | Phytogeographic aspects of Lysionotus pauciflorus sensu lato (Gesneriaceae) in the China, Japan and Taiwan regions: phylogenetic and morphological relationships and taxonomic consequences | Kokubugata, G.; Hirayama, Y.; Peng, C. -I; Yokota, M.; Moller, M. | PLANT SYSTEMATICS AND EVOLUTION 292(3-4), 177-188 | | | |
| 2011 | Taxonomic reconsideration and phylogeographic implication for Nertera yamashitae (Rubiaceae) | Kokubugata, G.; Nakamura, K.; Hirayama, Y.; Peng, C. -I; Yokota, M. | Bulletin of the National Science Museum Series B 37(1), 9-22 | | | |
| 2009 | Taxonomic reconsideration of Disporum luzoniense (Liliaceae sensu lato) using falvonoid characters | Saito, Y.; Iwashina, T.; Peng, C. -I; Kokubugata, G. | Blumea 54: 59-62 | | | |
| 2006 | Taxonomic reconsideration of Lysimachia ardisioides (Primilaceae) from Taiwan. | Kokubugata, G.; Peng, C. -I; Saito, Y.; Yokota, M.; Kobayashi, S. | Memoirs of the National Science Museum.,Tokyo. 44, 135-140 | | | |
