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 Hirokazu Nagai 1978
Japan Esophageal Oncology Group Yuko Kitagawa 1978
Lung Cancer Study Group Yuichiro Ohe 1982
Stomach Cancer Study Group Masanori Terashima   1984
Breast Cancer Study Group Hiroji Iwata 1985
Lung Cancer Surgical Study Group Shun-ichi Watanabe   1986
Gynecologic Cancer Study Group Nobuo Yaegashi 1995
Colorectal Cancer Study Group Yukihide Kanemitsu   2001
Urologic Oncology Study Group Hiroyuki Nishiyama 2001
Bone and Soft Tissue Tumor Study Group Toshifumi Ozaki 2002
Radiation Therapy Study Group Yasumasa Nishimura 2003
Brain Tumor Study Group Ryo Nishikawa   2003
Hepatobiliary and Pancreatic Oncology Group Junji Furuse   2008
Gastrointestinal Endoscopy Study Group Manabu Muto   2011
Head and Neck Cancer Study Group Ryuichi Hayashi   2011
Dermatologic Oncology Group Naoya Yamazaki   2012

Gastrointestinal Oncology Study Group(reorganized)