The Japan Clinical Oncology Group (JCOG) is the largest Japanese cooperative group funded primarily by the National Cancer Center Research and Development Fund.


Standing Committee
Standing Committee Chair Role
Executive Committee Yuichiro Ohe
  • Determine JCOG policies
  • Approve/disapprove protocol concepts
Protocol Review Committee Kaoru Kubota
  • Review protocol concepts
  • Review and approve study protocols
Data and Safety Monitoring Committee Hiroaki Okamoto
  • Monitor study progress
  • Review adverse event reports
  • Approve/disapprove protocol amendment/revision
  • Approve/disapprove study continuation (interim analysis)
Audit Committee Shun-ichi Watanabe
  • Conduct site visit audit
Education and Training Committee Seiichiro Yamamoto
  • Plan and conduct educational programs
Conflict of Interest Committee Takuhiro Yamaguchi
  • Manage conflict of interest
Discipline Committee
Discipline Committee Chair Role
Radiotherapy Committee Satoshi Ishikura
  • Quality control and quality assurance of radiotherapy
Pathology Committee Naobumi Tochigi
  • Quality control and quality assurance of pathological diagnosis
Translational Research Committee Yasuhiro Matsumura
  • Develop and streamline the system of translational research
  • Review translational research concept/protocol
Diagnostic Radiology Committee Hirokazu Watanabe
  • Support central reviews of imaging
Regulatory Affairs Committee Yasuhiro Fujiwara
  • Collect and distribute regulatory information
Clinical Research Professionals Committee Harumi Kaba
  • Facilitate the collaboration between central and local CRPs
  • Improve JCOG study quality in the viewpoint of CRPs
Geriatric Study Committee Fumio Nagashima
  • Define elderly/frail patients
  • Develop screening tools of elderly/frail
  • Develop“JCOG geriatric study policy”