KOBAYASHI Yoshiyasu Professor

ThemePathogenesis studies of naturally occurring animal diseases and lesions using pathologic methods

My DreamTo reveal pathogenesis of unelucidated diseases and lesions


Research Center for Global Agromedicine/Department Chief of Veterinary MedicineResearch Department/Department of Veterinary Medicine/Division of Veterinary Sciences/Section of Anatomy and PathologyVeterinary Medical Center/Diagnostic ResouceOffice for International Accreditation of Veterinary Education/Chair
Field (Veterianry) Pathology
Keyword Diagnostic Pathology, Experimental Pathology, Infectious Diseases, Neoplastic Diseases, Degenerative Diseases, Neuropathology, Perinatal Diseases, Molecular Pathology


There are many unelucidated diseases and lesions in animals. Therefore, my research works are aimed 1) to reveal the pathogenesis of newly recognized diseases/lesions, and 2) to reveal the unresolved points of the known disease/lesions via routine diagnostic services. In addition, I also carry out some pathogenesis study using animal experiments.

List of current research topics

Diagnostic pathology based research works:

  • Bovine virus diarrhea virus associated diseases: search for novel disease states
  • Perinatal brain damages in calves
  • Glomerular lesions of cattle
  • Optic tract neuropathy in Japanese black cattle
  • Bovine AA amyloidosis: mechanisms for heterogeneity in amyloid depositions
  • Papillomavirus associated diseases (tumors)
  • Protozoan diseases
  • Diseases in sea mammals etc

Experimental Research Works (mainly as collaborative works)

  • Animal models for human perinatal diseases (brain & lungs)
  • Pathological analyses for infectious diseases (bacterial, protozoan & viral diseases)
Affiliated academic society The Japanese Society of Veterinary Science, Japan Veterinary Medical Association, The Japanese College of Veterinary Pathologists, The Japanese Society of Veterinary Dermatology, The Japanese Society of Neuropathology
Editor The Journal of Veterinary Medical Science; 2012 - present
Editorial Board
  • Veterinary Pathology; 2009 - 2016
Academic degree PhD
License Veterinarian, Diplomate JCVP (Japanese College of Veterinary Pathologists)
Self introduction

I am continuing my research works to clarify the mechanisms of various diseases and lesions. Because there are many unexplained diseases and lesions, I would like to reveal these issues as many as possible.

Room addressGeneral Research Building 1
Mail address kyoshi atmark obihiro.ac.jp