Last Updated :2023/01/05

Affiliations, Positions
Hiroshima University, Assistant Professor
Web Site
Other Contact Details
1-4-1 Kagamiyama Higashihiroshima Hiroshima Pref., JAPAN, 739-8527, Japan
TEL : (+81)82-424-4558 FAX : (+81)
My research theme is including as follows: improvement of wastewater treatment using microbial communities, development of greenhouse gas mitigation technologies targeting nitrous oxide and methane, and analysis of environmental microbial communities and clarification of their physiological activities.

Basic Information

Major Professional Backgrounds

  • 2016/04/01, 2018/03/31, Japan Society for the Promotion of Science, Research Fellowship for Young Scientists (DC2)
  • 2018/04/16, 2019/03/31, Tokyo University of Agriculture and Technology, Chemical Engineering Department, Faculty of Engineering, Project Assistant Prfessor
  • 2019/04/01, 2021/03/31, Tokyo University of Agriculture and Technology, Global Innovation Research Institute, Project Assistant Professor

Educational Backgrounds

  • Tokyo University of Agriculture and Technology, Graduate School of Engineering, Department of Applied Chemistry, Japan, 2013/04/01, 2018/03/31
  • Tokyo University of Agriculture and Technology, Faculty of Engineering, Chemical Engineering Department, Japan, 2009/04/01, 2013/03/31

Research Fields

  • Engineering;Process / Chemical engineering;Biofunction / Bioprocess
  • Environmental science;Environmental conservation;Environmental engineering and reduction of environmental burden

Research Keywords

  • Molecular microbiology
  • Nitrogen cycle
  • Global warming
  • Wastewater treatment
  • Chemical engineering
  • Environmental engineering
  • Environmental microbiology

Affiliated Academic Societies


Educational Activity

Course in Charge

  1. 2022, Liberal Arts Education Program1, 1Term, Introductory Seminar for First-Year Students
  2. 2022, Undergraduate Education, 4Term, Technical English
  3. 2022, Undergraduate Education, Second Semester, Basic Experiments in Chemistry
  4. 2022, Undergraduate Education, 2Term, Introduction to Applied Chemistry, Chemical Engineering and Biotechnology
  5. 2022, Undergraduate Education, Second Semester, Chemical Engineering Exercise III
  6. 2022, Undergraduate Education, Second Semester, Chemical Engineering Exercise I
  7. 2022, Graduate Education (Master's Program) , 3Term, Special Exercises on Chemical Engineering B
  8. 2022, Graduate Education (Master's Program) , 3Term, Special Exercises on Chemical Engineering B
  9. 2022, Graduate Education (Master's Program) , 4Term, Special Exercises on Chemical Engineering B
  10. 2022, Graduate Education (Master's Program) , 4Term, Special Exercises on Chemical Engineering B
  11. 2022, Graduate Education (Master's Program) , Academic Year, Special Study on Chemical Engineering
  12. 2022, Graduate Education (Master's Program) , Academic Year, Special Study on Chemical Engineering

Research Activities

Academic Papers

  1. Exploring the Functions of Efficient Canonical Denitrifying Bacteria as N 2 O Sinks: Implications from 15 N Tracer and Transcriptome Analyses, Environmental Science and Technology, 56(16), 11694-11706, 20220802
  2. Low nitrous oxide concentration and spatial microbial community transition across an urban river affected by treated sewage, WATER RESEARCH, 216, 20220601
  3. N2O Reduction by Gemmatimonas aurantiaca and Potential Involvement of Gemmatimonadetes Bacteria in N2O Reduction in Agricultural Soils, Microbes and Environments, 37(2), 20220422
  4. Organic carbon determines nitrous oxide consumption activity of clade I and II nosZ bacteria: Genomic and biokinetic insights, WATER RESEARCH, 209, 20220201
  5. Nitrous oxide-sink capability of denitrifying bacteria impacted by nitrite and pH, CHEMICAL ENGINEERING JOURNAL, 428, 20220115
  6. Combination of N-15 Tracer and Microbial Analyses Discloses N2O Sink Potential of the Anammox Community, ENVIRONMENTAL SCIENCE & TECHNOLOGY, 55(13), 9231-9242, 20210706
  7. Metagenomic Insights Into Functional and Taxonomic Compositions of an Activated Sludge Microbial Community Treating Leachate of a Completed Landfill: A Pathway-Based Analysis, FRONTIERS IN MICROBIOLOGY, 12, 20210430
  8. Temperature and oxygen level determine N2O respiration activities of heterotrophic N2O-reducing bacteria: Biokinetic study, BIOTECHNOLOGY AND BIOENGINEERING, 118(3), 1330-1341, 20201211
  9. Enrichment, Isolation, and Characterization of High-Affinity N2O-Reducing Bacteria in a Gas-Permeable Membrane Reactor, Environmental Science & Technology, 53(20), 12101-12112, 20191015
  10. Biokinetic characterization and activities of N2O-reducing bacteria in response to various oxygen levels, Frontiers in Microbiology, 9, 20180410
  11. Influence of feedstock-to-inoculum ratio on performance and microbial community succession during solid-state thermophilic anaerobic co-digestion of pig urine and rice straw, Bioresource Technology, 252, 127-133, 20180301
  12. Exploration and enrichment of methane-oxidizing bacteria derived from a rice paddy field emitting highly concentrated methane, JOURNAL OF BIOSCIENCE AND BIOENGINEERING, 130(3), 311-318, 202009
  13. Eco-compatible biochar mitigates volatile fatty acids stress in high load thermophilic solid-state anaerobic reactors treating agricultural waste, BIORESOURCE TECHNOLOGY, 309, 123366-123366, 202008
  14. Identification of a Metagenome-Assembled Genome of an Uncultured Methyloceanibacter sp. Strain Acquired from an Activated Sludge System Used for Landfill Leachate Treatment, MICROBIOLOGY RESOURCE ANNOUNCEMENTS, 9(32), 202008
  15. Complete Genome Sequence of Methylosinus sp. Strain C49, Methane-Oxidizing Bacterium Harboring phaABC Genes for Polyhydroxyalkanoate Synthesis, MICROBIOLOGY RESOURCE ANNOUNCEMENTS, 9(27), 202007
  16. Complete Genome Sequence of Pseudomonas putida Strain TS312, Harboring an HdtS-Type N-Acyl-Homoserine Lactone Synthase, Isolated from a Paper Mill, MICROBIOLOGY RESOURCE ANNOUNCEMENTS, 9(13), 202003
  17. Spatial and daily variations of nitrous oxide emissions from biological reactors in a full-scale activated sludge anoxic/oxic process, Journal of Bioscience and Bioengineering, 127(3), 333-339, 201903
  18. Draft Genome Sequence of Azospira sp. Strain I13, a Nitrous Oxide-Reducing Bacterium Harboring Clade II Type nosZ, MICROBIOLOGY RESOURCE ANNOUNCEMENTS, 6(20), 201805
  19. Counter-diffusion biofilms have lower N2O emissions than co-diffusion biofilms during simultaneous nitrification and denitrification: Insights from depth-profile analysis, WATER RESEARCH, 124, 363-371, 201711
  20. Efficacy of a high-pressure jet device for excess sludge reduction in a conventional activated sludge process: Pilot-scale demonstration, CHEMICAL ENGINEERING JOURNAL, 326, 78-86, 201710
  21. Nitrite oxidation kinetics of two Nitrospira strains: The quest for competition and ecological niche differentiation, JOURNAL OF BIOSCIENCE AND BIOENGINEERING, 123(5), 581-589, 201705
  22. Free nitrous acid and pH determine the predominant ammonia-oxidizing bacteria and amount of N2O in a partial nitrifying reactor, APPLIED MICROBIOLOGY AND BIOTECHNOLOGY, 101(4), 1673-1683, 201702
  23. Effects of aeration and internal recycle flow on nitrous oxide emissions from a modified Ludzak-Ettinger process fed with glycerol, ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 22(24), 19562-19570, 201512
  24. Identification of a predominant effect on bacterial cell disruption and released organic matters by a high-pressure jet device, BIOCHEMICAL ENGINEERING JOURNAL, 101, 220-227, 201509
  25. High-pressure jet device for activated sludge reduction; Feasibility of sludge solubilization, BIOCHEMICAL ENGINEERING JOURNAL, 100, 1-8, 201508
  26. Abundance, transcription levels and phylogeny of bacteria capable of nitrous oxide reduction in a municipal wastewater treatment plant, JOURNAL OF BIOSCIENCE AND BIOENGINEERING, 118(3), 289-297, 201409
  27. Immobilization of Azospira sp. strain I13 by gel entrapment for mitigation of N2O from biological wastewater treatment plants: Biokinetic characterization and modeling, Journal of Bioscience and Bioengineering, 126(2), 213-219, 2018


  1. 2018/09, Orugano Awards, Japan Society of Water Environment
  2. 2017/08, Excellent Poster Awards, Japanese Society of Microbial Ecology
  3. 2015/03, Kurita Awards, Japan Society of Water Environment

Social Activities

History as Committee Members

  1. A committee of journal topics, 2023/01, 2024/12, The Society of Chemical Engineers, Japan
  2. Committee member, 2021/04/01, 2023/03/31, The Society of Chemical Engineers Japan, Branch of Chugoku-Shikoku Area
  3. Secretary-general, 2021/06/01, 2023/05/31, Chugoku-Shikoku Branch, Japan Society on Water Environment
  4. Treasurer, 2021/04/01, 2023/03/31, Division of Environment, The Society of Chemical Engineers Japan