FUKUMA Naoki Associate Professor

My DreamTo contribute to sustanable food production

ThemeElucidation of microbial species related to fiber degradation or metabolic disorders and exploration of functional feed materials optimizing gut fermentation in herbivore animals


Animal Nutrition, Microbial Ecology, Microbial Phygiology, Microbial Genomics, Microbiome


ruminant, herbivore, monogastoric animal, wildlife, feed, unused resource, feed additive, probiotics, prebiotics, rumen, fiber degradation, digestion, fermentation, microbe, intestinal bacteria, microbiome, next generation sequencing, metagenomics, bioinformatics

Instructable research topic for doctoral thesis



  • DFAIIIの代用乳への添加が子牛の増体および下部消化管内微生物叢に及ぼす影響
  • 集積培養におけるpHの違いがルーメン内乳酸利用性細菌群の増殖および構成に及ぼす影響
  • ソバ殻抽出物の添加がin vitroルーメン発酵に及ぼす影響
  • 重種馬の下部消化管内発酵に寄与する主要細菌群の特定




Academic degree Ph.D. in Agriculture
Self introduction

I am Naoki, from Hiroshima. My research target is microbes living in the gastrointestinal tract of herbivore animals. I like playing the clarinet, taking photographs, and drinking whisky.

Room addressGeneral Research Building 1
Room numberS3103-1
Mail address n.fukumax atmark obihiro.ac.jp


Research Center for Global Agromedicine/Department of Agriculture and Animal ScienceResearch Department/Department of Life and Food Sciences/Division of Animal Production/Section of Animal Husbandry


My research target is microbes related to fiber degradation/fermentation in the gastrointestinal tract of herbivore animals including ruminants. Herbivore animals, such as cattle, grow by eating grass, but actually animals themselves are not capable of digesting grass. In their gut there are 1 to 10 billions of microorganisms, and they degrade and ferment plant fibrous materials and convert it into nutrients. When these microorganisms function normally, digestion of plant fibers and absorption of nutrients are smoothly carried out, but when the microbial balance gets lost, metabolic disorder can happen. So, my research goal is to answer the following questions; in the herbivore gut microbial fermentation, 1) what is the optimum balance, 2) what is the factor which disorders it, and 3) what is the way to optimise it.
In my research, samples are taken from both of in vitro and in vivo experiments, and microorganisms are detected using molecular biological methods. Our recent approach is detecting “microbiome”, which is an assembly of microorganisms, and we perform comprehensive analysis using next generation sequencing technology. Using such various approaches, we have been trying to identify the microorganisms which are important for fiber digestion or related to metabolic disorders and evaluate the effect of feed supplements and functional feed materials.

in vitro batch culture simulating gut environment
Microbial community analysis using next generation sequencing

List of current research topics

  • Elucidation of fiber degrading system in herbivore gastrointestinal tract
  • Determination of microbial species related to metabolic disorders in herbivore animals
  • Exploration of functional feed materials optimizing gut fermentation
Affiliated academic society Japanese Society for Rumen Metabolism and Physiology, Japanese Society of Animal Science
Academic background 2009 B.S. Hokkaido University
2011 M.S. Hokkaido University
2015 Ph.D. Hokkaido University
2015-2016 Researcher, Hokkaido University
2015-2016 Visiting Academic, University of Queensland Diamantina Institute
2016 Research fellow, University of Queensland Diamantina Institute
2016.10 - present