The purpose of the JBCRG shall be the following: to plan and promote clinical trials and basic research in breast cancer domestically and multilaterally; to conduct research and surveys on domestic and foreign information on medical care for breast cancer and to diffuse and illuminate such information; to improve and promote clinical technologies for breast cancer; to act as an intermediary to liaise and strengthen alliances with affiliated organizations; and, to contribute to the public welfare by improving outcomes in breast cancer.
The JBCRG shall carry out the following, to serve the aforementioned purpose:
Currently (Jun. 2011), 228 doctors from 149 Institutes are registered as JBCRG members who are specialists from the breast cancer treating hospitals around Japan.
Also, JBCRG is a member of Breast International Group (BIG), which is a international breast cancer research group.
(Honorifics omitted・In the order of the Japanese syllabary except Director/Chair)
| Masakazu Toi (Representative Director) | Department of Surgery (Breast Surgery), Graduate School of Medicine Kyoto University |
| Kenjiro Aogi | Department of Breast and Endocrine Surgery, Shikoku Cancer Center |
| Hiroshi Ishiguro | Outpatient Oncology Unit, Kyoto University Hospital |
| Hiroji Iwata | Department of Breast Oncology, Aichi Cancer Center Hospital |
| Shinji Ohno | Division of Breast Oncology, National Kyushu Cancer Center |
| Hidetaka Kawabata | Department of Breast and Endocrine Surgery, Toranomon Hospital |
| Katsumasa Kuroi (Executive Director) | Department of Surgery, Tokyo Metropolitan Cancer & Infectious Disease Center, Komagome General Hospital |
| Hironobu Sasano | Department of Pathology, Tohoku University Hospital |
| Nobuaki Sato | Surgery Dept, Niigata Cancer Center Hospital |
| Seigo Nakamura | Breast Center, Showa University Hospital |
| Norikazu Masuda | Dept of Surgery, Osaka National Hospital |
| Masashi Bando | Department of Plastic Surgery, Tokyo Metropolitan Cancer & Infectious Disease Center, Komagome General Hospital |
(Honorifics omitted・In the order of the Japanese syllabary except Director/Chair)
| Hironobu Sasano (Chair) | Department of Pathology, Tohoku University Hospital |
| Shigehira Saji | Department of Target Therapy Oncology, Kyoto University, Graduate School of Medicine |
| Tomoharu Sugie | Department of Surgery (Breast Surgery), Graduate School of Medicine Kyoto University |
| Takahiro Nakayama | Department of Breast and Endocrine Surgery, Graduate School of Medicine Osaka University |
| Yutaka Yamamoto | Department of Breast & Endocrine Surgery, Graduate School of Life Sciences, Kumamoto University |
(Honorifics omitted・In the order of the Japanese syllabary except Director/Chair)
| Shinji Ohno (Chair) | Division of Breast Oncology, National Kyushu Cancer Center |
| Takayuki Ueno | Department of Surgery (Breast Surgery), Graduate School of Medicine Kyoto University |
| Hidetoshi Kawaguchi | Division of Breast Oncology, National Kyushu Cancer Center |
| Katsumasa Kuroi | Department of Surgery, Tokyo Metropolitan Cancer & Infectious Disease Center, Komagome General Hospital |
| Masato Takahashi | Department of Breast Surgery, Hokkaido Cancer Center |
| Hirofumi Mukai | Division of Oncology / Hematology, National Cancer Center Hospital East |
(Honorifics omitted・In the order of the Japanese syllabary except Director/Chair)
| Hiroji Iwata (Chair) | Department of Breast Oncology, Aichi Cancer Center Hospital |
| Shoichiro Ohtani | Department of breast cancer, Hiroshima City Hospital |
| Shigehira Saji | Department of Target Therapy Oncology, Kyoto University, Graduate School of Medicine |
| Tomomi Fujisawa | Department of breast oncology, Gunma prefectural cancer center |
| Norikazu Masuda | Dept of Surgery, Osaka National Hospital |
| Satoshi Morita | Department of Biostatistics and Epidemiology, Graduate School of Medicine, Yokohama City University |
| Toshinari Yamashita | Department of Surgery, Tokyo Metropolitan Cancer & Infectious Disease Center, Komagome General Hospital |
(Honorifics omitted・In the order of the Japanese syllabary except Director/Chair)
| Seigo Nakamura (Chair) | Breast Center, Showa University Hospital |
| Hidetaka Kawabata | Department of Breast and Endocrine Surgery, Toranomon Hospital |
| Masahide Kondo | Department of Health Care Policy and Management, Graduate school of Comprehensive Human Science, University of Tsukuba |
| Masayasu Takada | Department of Surgery (Breast Surgery), Graduate School of Medicine Kyoto University |
| Toshinari Yamashita | Department of Surgery, Tokyo Metropolitan Cancer & Infectious Disease Center, Komagome General Hospital |
(Honorifics omitted・In the order of the Japanese syllabary except Director/Chair)
| Norikazu Masuda (Chair) | Dept of Surgery, Osaka National Hospital |
| Masahiro Kashiwaba | Department of Surgery, Iwate Medical University |
| Yasuaki Sagara | Breast Surgical Oncology, Social Medical Corporation Hakuaikai, Sagara Hospital |
| Masataka Sawaki | Department of Breast Oncology, Aichi Cancer Center Hospital |
| Hideo Shigematsu | Dept. of Breast Surgery, Hiroshima university hospital |
| Mitsuhiro Tozaki | Breast Center, Kameda Medical Center |
| Takahiro Nakayama | Department of Breast and Endocrine Surgery, Graduate School of Medicine Osaka University |
| Hiroko Bando | Department of Breast and Endocrine Surgery, Graduate school of Comprehensive Human Science, University of Tsukuba |
| Yoshiki Mikami | Department of Pathology, Graduate School of Medicine Kyoto University |
| Hiroyasu Yamashiro | Department of Breast Surgery, Kure Medical Center |
| Seiichiro Yamamoto | Cancer for Cancer Control and Informaition Services, National Cancer Center |
(Honorifics omitted・In the order of the Japanese syllabary except Director/Chair)
| Nobuaki Sato (Chair) | Surgery Dept, Niigata Cancer Center Hospital |
| Masahiro Kashiwaba | Department of Surgery, Iwate Medical University |
| Hidetoshi Kawaguchi | Division of Breast Oncology, National Kyushu Cancer Center |
| Shigenori Nagai | Dept of Breast Medical Oncology, Saitama Cancer Center |
| Hiroko Bando | Department of Breast and Endocrine Surgery, Graduate school of Comprehensive Human Science, University of Tsukuba |
Is composed of the board of directors and the principal investigator of each study.
*The details are stated separately in the protocol for each study.
| Katsumasa Kuroi | Executive Director (Department of Surgery, Tokyo Metropolitan Cancer & Infectious Disease Center, Komagome General Hospital) |
| Kiyomi Kashiwa | Staff |
| Nobuko Aoki | Staff |
| Ikuko Hashimoto | Staff |
| Ruriko Sakaue | Staff |
| Tetsuhiro Sakai | Manager |
| Junichi Shishido | Staff |
| Yayoi Obata | Staff |
| Aya Maruyama | Staff |
The Japan Breast Cancer Research Group (JBCRG) was founded in order to perform good quality multicenter studies, and related clinical trials in close
liaison with research institutions in other countries and regions, as well as in Japan.
We have performed a variety of studies, including primary pharmacotherapy, pharmacotherapy for recurrent breast cancer,
clinical trials on postoperative pharmacotherapy, prediction of prognosis in hormone receptor positive breast cancer,
and prediction of the effect of chemotherapeutic drugs. We have reported a number of outcomes to academic societies and journals,
and have obtained good reputation. The incidence of breast cancer in Japan has increased yearly; thus,
more attention has been given to breast cancer treatment, among all cancers.
In order to save as many breast cancer patients as possible, and to improve their QOL, we will develop new diagnostic methods and treatments,
and prophylaxes for breast cancer. Please support us with your generous contribution.

Representative Director:
Professor Masakazu Toi
Department of Surgery,
Breast Surgery,
Graduate School of Kyoto University
Head Office
3-14-16-5F Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
TEL: 03-6659-7723
FAX: 03-6659-7726
E-mail : office@jbcrg.jp
Data Center
Kinki District Invention Center Main Bldg.1st Floor Room 7,
14 Yoshida-kawahara-cho, Sakyo-ku, Kyoto 606-8305, Japan
TEL&FAX : 075-751-0230
E-mail : data@jbcrg.jp
Articles of Association of the Japan Breast Cancer Research Group
The Rules of the Japan Breast Cancer Research Group
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