Our Team


  • Kotaro Sasaki, MD, PhD
    • Kotaro Sasaki MD-PhD-Sasaki Lab copyKotaro Sasaki received his MD and PhD from Hokkaido University in 2005 and Kyoto University in 2017, respectively. He is a board certified anatomic pathologist, completed anatomic pathology residency at the University of Pittsburgh in 2011 and renal pathology fellowship at the University of Washington in 2012. Prior to joining the University of Pennsylvania, he completed a postdoc training at Mitinori Saitou Lab at Kyoto University, Japan. His major research interest involves the understanding the molecular mechanisms of human germ cell and gonadal development using single cell genomics and their in vitro reconstitution using pluripotent stem cells. 

  • Michinori Mayama, MD
    • Michinori Mayama, MD-Sasaki Lab Education
      • MD - School of Medicine, Hokkaido University
      • PhD - Graduate School of Medicine, Hokkaido University (to be conferred June 2021)
    • Professional Experience
      • 2021- Postdoctoral fellow, Department of Biomedical Sciences, University of Pennsylvania
      • 2018 – 2021: Department of Obstetrics, Hokkaido University Hospital
      • 2017 - 2018: Department of Obstetrics and Gynecology, Oji General Hospital
      • 2011 – 2017: Department of Obstetrics and Gynecology, TOYOTA Memorial Hospital
  • Yuka Sakata, PhD
    • Yuka Handa, PhD-Sasaki Lab copyEducation
      • PhD - Department of Medical Sciences, Graduate School of Medical Sciences, Kyushu University, Japan (Hiroyuki Sasaki lab)
    • Professional Experience
      • 2019 - Postdoctoral fellow Department of Biomedical Sciences, University of Pennsylvania.
      • 2017 - 2019: Staff technician in the laboratory of Dr. Noriko Saitoh Division of Cancer Biology, Cancer institute of JFCR, Japan
      • 2015 - 2017: Lab technician in the laboratory of Dr. Takashi Sado Department of Advanced Bioscience, Graduate School of Agriculture, Kindai University, Japan
  • Young Sun Hwang, PhD
    • Youngsun Hwang PhD-Sasaki Lab copyEducation
      • PhD - Biomodulation Major, Department of Agricultural Biotechnology, Seoul National University, Korea.
      • BSc - Department of Food and Animal Biotechnology, Seoul National University, Korea.
    • Professional Experience
      • 2018 - Postdoctoral fellow, Department of Biomedical Sciences, University of Pennsylvania.
      • 2018 - 2018: Senior Researcher, Research Institute of Agriculture and Life Sciences, Seoul National University.
  • Yasunari Seita, PhD
      • Yasunari Seita PhD-Sasaki Lab copyEducation
        • PhD - Veterinary Science, Azabu University, Japan
        • MS - Veterinary Science, Azabu University, Japan
        • BSc - Veterinary Science, Azabu University, Japan
      • Professional Experience
        • 2019 - Postdoctoral fellow, Department of Biomedical Sciences, University of Pennsylvania.
        • 2016 - 2019: Research Lecturer, Department of Stem Cells and Human Disease Models, Research Center for Animal Life Science, Shiga University of Medical Science
        • 2014 - 2016: Project Assistant Professor. Department of Stem Cells and Human Disease Models, Research Center for Animal Life Science, Shiga University of Medical Science
        • 2009 - 2014: Postdoctoral fellow. Division of Obstetrics, Gynecology and Reproductive Sciences, Rutgers Robert Wood Johnson Medical School (Chi-Wei Lu lab)
  • Keren Cheng, PhD
    • Keren Cheng-Sasaki Lab Education
      • PhD - Department of Animal Science, China Agricultural University, China
      • >BSc - Department of Animal Science, Nanjing Agricultural University, China
    • Professional Experience
      • 2021- Research Associate, Department of Biomedical Sciences, University of Pennsylvania
      • 2019 - 2021: Assistant Professor of Research, Department of Biology, University of Texas at San Antonio
      • 2015 - 2019: Postdoctoral fellow, Department of Biology, University of Texas at San Antonio
  • Taku Moriwaki, DVM
    • Taku Moriwaki-Sasaki Lab Education
      • BS/DVM - Veterinary Medicine, Azabu University, Japan
    • Professional Experience
      • 2021 - Technician, Department of Biomedical Sciences, University of Pennsylvania
      • 2016 – 2019: General Practice Veterinarian, Marble Veterinary Medical Center
  • Ian Paez
    • Ian Paez-Sasaki Lab Education
      • BS - Cell and Molecular Biology, University of Pennsylvania
    • Professional Experience
      • 2021 - EMT with Penn’s Medical Emergency Response Team
      • 2020 – 2021: Lab Assistant, Mourkioti Laboratory, University of Pennsylvania.

Interested in Joining the Sasaki Lab Team?

We are always looking for enthusiastic and creative people to come work with us. We welcome students and postdocs with diverse background regardless of race, ethnicity, religion, age, gender identity and sexual orientation. If you are interested in joining the lab, please contact the principal investigator, Dr. Kotaro Sasaki.


– Now Hiring –


Post-doctoral Positions

Ph.D. and/or M.D. scientists trained in any fields of biology are welcome. Candidates with a background of bioinformatics/computational biology are particularly encouraged to apply. Read the full description for the post-doctoral positions (PDF)...

Any interested individuals should send their CV and a summary of research accomplishments to: ksasaki@upenn.edu