ABOUT US
At our laboratory, we conduct research on water environments such as rivers and lakes, with a particular focus on issues related to human health. In particular, we seek to clarify why pathogenic microorganisms persist in aquatic environments, how they spread, and what factors naturally suppress them, with the goal of contributing to safer recreational water use and more effective sanitary management of water environments. Based on fieldwork in aquatic environments in Japan and abroad, we integrate a wide range of approaches, including genetic analysis, mathematical modeling, and machine learning, to elucidate the principles governing the persistence, spread, and control of environmental pathogens.
We always welcome students and postdoc researchers (PDs) who are interested in our research topics. If you need more information, please feel free to contact us.
★Contact (mail)：i.yoneda(at)yamanashi.ac.jp
NEWS & TOPICS
- 2026.04.01. New Project
New project is adopted by "River Foundation，River fund" (PI: Asst. Prof. Yoneda)
Project Title: Development of a method for predicting the suitability for recreation in river using quantitative microbial risk assessment
Research Period：2026.04～2027.03 - 2026.04.01. New Project
New project is adopted by "Japan Society for the Promotion of Science (JSPS), Grant-in-Aid for Early-Career Scientists" (PI: Asst. Prof. Yoneda)
Project Title: Searching for predatory protozoa contributing to the control of pathogenic microbial contamination in aquatic environments
Research Period：2026.04～2029.03 - 2025.10.01. New Project
New project is adopted by "Kurita Water and Environment Foundation (KWEF)" (PI: Asst. Prof. Yoneda)
Project Title: Effects of rainfall characteristics on the post-rainfall dynamics of pathogenic microorganisms in waterside space in river
Research Period：2025.10～2026.09 - 2025.09.26. New Member
3 new members (B3) have joined our laboratory. The total number of laboratory members is six.I hope everything goes well. - 2025.07.31. New Project
New project is adopted by "Japan Society for the Promotion of Science (JSPS), Grant-in-Aid for Research Activity Start-up" (PI: Asst. Prof. Yoneda)
Project Title: Elucidation of the source of Escherichia coli strain adapted to aquatic environments and evaluation of its growth potential
Research Period：2025.08～2027.03 - 2025.07.11: International Conference
Dr. Yoneda gave poster presentation at WaterMicro2025 (22nd International Symposium on Health-Related Water Microbiology) during 15-20 June, 2025
1. Ichiro Yoneda, Yasunari Shikanai, Masateru Nishiyama, Toru Watanabe. Differences in survival in water of wild Escherichia coli strains isolated from rivers.
2. Ichiro Yoneda, Masateru Nishiyama, Toru Watanabe. Development of numerical models on Escherichia coli survival in lakes employing multiple environment factors.
3. Toru Watanabe, Ichiro Yoneda, Maya Yamada, Kota Hisai, Masateru Nishiyama, You Ueki, Akie Sakagami. Factors affecting norovirus accumulation from seawater in oysters and its depuration: virus concentration, feeding, depuration periods, and growth stage.
4. Ritsu Yokoyama, Masateru Nishiyama, Hiroki Matsuyama, Ichiro Yoneda, Toru Watanabe. Impacts of feeds cultivated using resources from municipal wastewater and its treatment on antibiotic resistance of Escherichia coli in pigs. - 2025.04.01: Info.
YONEDA Laboratory has been newly established in Faculty of Engineering, Course of Civil and Environmental Engineering, University of Yamanashi. We will start our research activities in Yamanashi Prefecture, Japan.