Environmental Biotechnology


Assistant Professor


Tel: 075-753-7894
E-mail: kamikawa.ryoma.7v*kyoto-u.ac.jp (replace * with @)


2007-09 JSPS Research Fellow DC1
2009-11 JSPS Research Fellow PD
2011-13 Assistant Professor with Fixed-term (Faculty of Life and Environmental Sciences, University of Tsukuba)
2013- Assistant Professor (Graduate School of Global Environmental Studies and Graduate School of Human and Environmental Studies, Kyoto University)

Major Publications

  • Ryoma Kamikawa, Yubuki N, Yoshida M, Taira M, Nakamura N, Ishida K, Leander BS, Miyashita H, Hashimoto T, Mayama S, Inagaki Y. Multiple losses of photosynthesis in Nitzschia (Bacillariophyceae). Phycological Research In press.
  • Ryoma Kamikawa, Inagaki Y, Hashimoto T. 2014. Secondary loss of a cis-spliced intron during the divergence of Giardia intestinalis assemblages. BMC Research Notes 7:413.
  • Ryoma Kamikawa, Kolisko M, Nishimura Y, Yabuki A, Brown MW, Ishikawa AS, Ishida K, Roger AJ, Hashimoto T, Inagaki Y. 2014. Gene-content evolution in discobid mitochondria deduced from the phylogenetic position and complete mitochondrial genome of Tsukubamonas globosa. Genome Biology and Evolution 6(2):306-315.
  • Yabuki A(a), Ryoma Kamikawa(a), Ishikawa AS, Kume K, Kolisko M, Kim E, Tanabe AS, Ishida K, Inagaki Y. 2014. Palpitomonas bilix represents a basal cryptist lineage: insight into the character evolution in Cryptista. Scientific Reports 4:4641
  • Ryoma Kamikawa, Brown MW, Nishimura Y, Sako Y, Heiss AA, Yubuki N, Gawryluk R, Simpson AGB, Roger AJ, Hashimoto T, Inagaki Y. 2013. Parallel re-modeling of EF-1α function: Divergent EF-1α genes co-occur with EFL genes in diverse distantly related eukaryotes. BMC Evolutionary Biology 13:131
  • Nishimura Y(a), Ryoma Kamikawa(a), Hashimoto T, Inagaki Y. 2012. Separate origins of group I introns in two mitochondrial genes of the katablepharid Leucocryptos marina. PLoS One 7(5): e37307.
  • Ryoma Kamikawa, Inagaki Y, Hashimoto T. 2011. A novel spliceosome-mediated trans-splicing can change our view on the genome complexity of the divergent eukaryote Giardia intestinalis. Biophysical Reviews 3(4):193-197.
  • Ryoma Kamikawa, Inagaki Y, Roger AJ, Hashimoto T. 2011. Splintrons in Giardia intestinalis: Spliceosomal introns in a split form. Communicative and Integrative Biology 4(4):454-456.
  • Ryoma Kamikawa, Inagaki Y, Tokoro M, Roger AJ, Hashimoto T. 2011. Split introns in the genome of a divergent eukaryote Giardia intestinalis are excised by spliceosome-mediated trans-splicing. Current Biology 21(4): 311-315.
  • Ryoma Kamikawa, Yabuki A, Nakayama T, Ishida K, Hashimoto T, Inagaki Y. 2011. Cercozoa comprises both EF-1α-containing and EFL-containing members. European Journal of Protistology 47(1): 24-28.
  • Masuda I(a), Ryoma Kamikawa(a), Ueda M, Oyama K, Yoshimatsu S, Inagaki Y, Sako Y. 2011. Mitochondrial genomes from two red tide forming raphidophycean algae Heterosigma akashiwo and Chattonella marina var. marina. Harmful Algae 10(2):130-137.
  • Ryoma Kamikawa, Sakaguchi M, Matsumoto T, Hashimoto T, Inagaki Y. 2010. Rooting for the root of elongation factor-like protein phylogeny. Molecular Phylogenetics and Evolution 56(4): 1082-1088.
  • Ryoma Kamikawa, Nishimura H, Sako Y. 2009. Analysis of the mitochondrial genome, transcripts, and electron transport activity of the dinoflagellate Alexandrium catenella (Gonyaulacales, Dinophyceae). Phycological Research 57(1): 1-11.
  • Ryoma Kamikawa, Masuda I, Demura M, Oyama K, Yoshimatsu S, Kawachi M, Sako Y. 2009. Mitochondrial group II introns in raphidophycean flagellates Chattonella spp. suggest a diatom-to-Chattonella lateral group II intron transfer. Protist 160(3): 364-375.
  • Ryoma Kamikawa, Sanchez-Perez GF, Sako Y, Roger AJ, Inagaki Y. 2009. Expanded phylogenies of canonical and non-canonical types of methionine adenosyltransferase reveal a complex history of these gene families in eukaryotes. Molecular Phylogenetics and Evolution 53(2): 565-570.
  • Ryoma Kamikawa, Hosoi-Tanabe S, Yoshimatsu S, Oyama K, Masuda I, Sako Y. 2008. Development of a novel molecular marker on mitochondrial genomes in a toxic dinoflagellate Alexandrium spp., and its application in single cell PCR. 2008. Journal of Applied Phycology 20(2): 153-159.
  • Ryoma Kamikawa, Inagaki Y, Sako Y. 2008. Direct phylogenetic evidence for lateral transfer of elongation factor-like gene. Proceedings of the National Academy of Sciences of the United States of America 105(19): 6965-6969.
  • Ryoma Kamikawa, Nagai S, Hosoi-Tanabe S, Itakura S, Yamaguchi M, Uchida Y, Baba T, Sako Y. 2007. Application of real-time PCR assay for detection and quantification of Alexandrium tamarense and A. catenella cysts from marine sediments. Harmful Algae 6(2): 413-420.
  • Ryoma Kamikawa(a), Inagaki Y(a), Sako Y. 2007. Fragmentation of mitochondrial large subunit rRNA in the dinoflagellate Alexandrium catenella and the evolution of rRNA structure in alveolate mitochondria. Protist 158(2): 239-245.
  • Ryoma Kamikawa, Masuda I, Oyama K, Yoshimatsu S, Sako Y. 2007. Genetic variation in mitochondrial genes and intergenic spacer region of harmful algae Chattonella species. Fisheries Science 73(4): 871-880.
  • Ryoma Kamikawa, Asai J, Miyahara T, Murata T, Oyama K, Yoshimatsu Y, Yoshida T, Sako Y. 2006. Application of a real-time PCR assay to a comprehensive method for monitoring harmful algae. Microbes & Environments 21(3): 163-173.
  • Ryoma Kamikawa, Hosoi-Tanabe S., Nagai S., Itakura S., Sako Y. 2005. Development of a quantification assay for the cysts of the toxic dinoflagellate Alexandrium tamarense using real-time polymerase chain reaction assay. Fisheries Science 71(5): 887-891.