Contact Us

JCOG Data Center/JCOG Operations Office
Clinical Research Support Office (CRSO),
National Cancer Center Hospital

5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, JAPAN
Webmaster@ml.jcog.jp

All of the JCOG-participating institutions are located in Japan. Patients living outside Japan cannot enter JCOG studies.