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

Study Groups

Study Group Chair Read More Year Established
Lymphoma Study Group Kunihiro Tsukasaki MD, PhD 1978
Japan Esophageal Oncology Group Yuko Kitagawa MD, PhD 1978
Lung Cancer Study Group Yuichiro Ohe MD, PhD 1982
Stomach Cancer Study Group Mitsuru Sasako MD, PhD   1984
Breast Cancer Study Group Hiroji Iwata MD, PhD 1985
Lung Cancer Surgical Study Group Hisao Asamura MD   1986
Gynecologic Cancer Study Group Nobuo Yaegashi MD, PhD 1995
Colorectal Cancer Study Group Yasuhiro Shimada MD   2001
Urologic Oncology Study Group Yoshiyuki Kakehi MD, PhD 2001
Bone and Soft Tissue Tumor Study Group Yukihide Iwamoto MD, PhD 2002
Radiation Therapy Study Group Masahiro Hiraoka MD, PhD 2003
Brain Tumor Study Group Ryo Nishikawa MD   2003
Hepatobiliary and Pancreatic Oncology Group Junji Furuse MD, PhD   2008
Gastrointestinal Endoscopy Study Group Manabu Muto MD, PhD   2011
Head and Neck Cancer Study Group Masato Fujii MD, PhD   2011
Dermatologic Oncology Group Naoya Yamazaki MD, PhD   2012

Gastrointestinal Oncology Study Group(reorganized)