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RIKEN BioResource Research Center (BRC®) Microbe Division (RIKEN BRC JCM)

Director: Moriya Ohkuma (Ph.D.)

Research Summary

Moriya  Ohkuma(Ph.D.)

The Microbe Division in RIKEN-BRC has been collecting, preserving, standardizing, and distributing cultured microbial strains since established as Japan Collection of Microorganisms (JCM) in 1981. Our mission is to contribute to scientific communities in a variety of research fields by maintaining and serving high-quality microbial resources useful for general microbial studies and researches related to environmental and human health issues. As a research and development laboratory, we are also working to continuously improve our function as a microbial resource center, to develop new microbial resources, to describe novel microbial taxa, and to investigate microbial communities and yet-uncultured microorganisms.

Main Research Fields

  • Microbiology

Related Research Fields

  • Biology & Biochemistry
  • Molecular Biology & Genetics
  • Agricultural Sciences
  • Environment & Ecology

Research Subjects

  • Collection, preservation, quality control, and distribution of microbial strains
  • Development of microbial resources for environmental and health researches
  • Isolation and characterization of new microbial strains
  • Studies on microbial communities and yet-uncultured microorganisms

Selected Publications

  • 1.Yuki, M., Sakamoto, M., Nishimura, Y., and Ohkuma, M.:
    Lactococcus reticulitermitis sp. nov., isolated from the gut of the subterranean termite Reticulitermes speratus
    Int. J. Syst. Evol. Microbiol. 68: 596-601 (2018)
  • 2.Noda, S., Shimizu, D., Yuki, M., Kitade, O., and Ohkuma, M.:
    ”Host-symbiont cospeciation of termite-gut cellulolytic protists of the genera Teranympha and Eucomonympha and their Treponema endosymbionts”
    Microbes Environ. 33: 26-33 (2018)
  • 3.Suzuki, S., Endoh, R., Manabe, R., Ohkuma, M., and Hirakawa, Y.:
    ”Multiple losses of photosynthesis and convergent reductive genome evolution in the colourless green algae Prototheca
    Sci. Rep. 8: 940 (2018)
  • 4.Sakamoto, M., Iino, T., and Ohkuma, M.:
    Faecalimonas umbilicata gen. nov., sp. nov., isolated from human faeces, and reclassification of Eubacterium contortum, Eubacterium fissicatena and Clostridium oroticum as Faecalicatena contorta gen. nov., comb. nov., Faecalicatena fissicatena comb. nov. and Faecalicatena orotica comb. nov.”
    Int. J. Syst. Evol. Microbiol. 67: 1219-1227 (2017)
  • 5.Kuwahara, H., Yuki, M., Izawa, K., Ohkuma, M., and Hongoh, Y.:
    “Genome of ‘Ca.Desulfovibrio trichonymphae’, an H2-oxidizing bacterium in a tripartite symbiotic system within a protist cell in the termite gut.”
    ISME J. 11: 766-776 (2017)
  • 6.Lee, C. G., Iida, T., Uwagaki, Y., Otani, Y., Nakaho, K., and Ohkuma, M.:
    ”Comparison of prokaryotic and eukaryotic communities in soil samples with and without tomato bacterial wilt collected from different fields”
    Microbes Environ. 32: 376–385 (2017)
  • 7.Nakazawa, S., Haramiishi, A., Fukuda, K., Kanayama, Y., Watanabe, T., Yuki, M., Ohkuma, M., Takeda, K., Kimbara, K., and Shintani, M.:
    ”Different transferability of incompatibility (Inc) P-7 plasmid pCAR1 and IncP-1 plasmid pBP136 in stirring liquid conditions”
    PLoS ONE 12: e0186248 (2017)
  • 8.Itoh, T., Onishi, M., Kato, S., Iino, T., Sakamoto, M., Kudo, T., Takashina, T., and Ohkuma, M.:
    Athalassotoga saccharophila gen. nov., sp. nov., isolated from an acidic terrestrial hot spring, and proposal of Mesoaciditogales ord. nov. and Mesoaciditogaceae fam. nov. in the phylum Thermotogae
    Int. J. Syst. Evol. Microbiol. 66: 1045-1051 (2016)
  • 9.Sriswasdi, S., Takashima, M., Manabe, R., Ohkuma, M., Sugita, T., and Iwasaki, W.:
    “Global deceleration of gene evolution following recent genome hybridizations in fungi”
    Genome Res. 26: 1081-1090 (2016)
  • 10.Ohkuma, M., Noda, S., Hattori, S., Iida, T., Yuki, M., Starns, D., Inoue, J., Darby, A.C., and Hongoh, Y.:
    “Acetogenesis from H2 plus CO2 and nitrogen fixation by an endosymbiotic spirochete of a termite-gut cellulolytic protist”
    Proc. Natl. Acad. Sci. USA 112: 10224-10230 (2015)

Recent Research Results

Related Links

Lab Members

Principal investigator

Moriya Ohkuma

Core members

Toshiya Iida
Senior Research Scientist
Mitsuo Sakamoto
Senior Research Scientist
Takao Iino
Senior Research Scientist
Shingo Kato
Senior Scientist
Rikiya Endo
Research Scientist
Yumi Oshida
Expert Technician
Akira Hashimoto
Postdoctoral Researcher
Atsushi Hisatomi
Postdoctoral Researcher
Gen Okada
Special Temporary Research Scientist
Takashi Itoh
Special Temporary Research Scientist
Michiru Shimizu
Technical Staff I
Kouji Suzu
Technical Staff II
Yoko Morishita
Technical Staff II

Contact Information

3-1-1 Koyadai
Tsukuba, Ibaraki
305-0074 Japan
Email: mohkuma [at] riken.jp