Okayama University Graduate School of Medicine Department of General Thoracic Surgery and Breast and Endocrinological Surgery

Breast and Endocrinological Surgery

Staff Introduction/Outpatient Days

Find a doctor

	Monday	Tuesday	Wednesday	Thursday	Friday
AM	Monday	Tuesday Tadahiko Shien Yuko Takahashi	Wednesday Tsuguo Iwatani	Thursday Tadahiko Shien Yuko Takahashi	Friday Tsuguo Iwatani
PM	Monday Maki Tanioka	Tuesday Tadahiko Shien Yuko Takahashi	Wednesday Tsuguo Iwatani	Thursday Tadahiko Shien Yuko Takahashi	Friday Tsuguo Iwatani

Staff Introduction

	Name
Associate Professor	Tadahiko Shien
Associate Professor	Tsuguo Iwatani
Assistant　Professor	Yuko Takahashi
Medical Staff	Shogo Nakamoto
Medical Staff	Maya Kosaka
Medical Staff	Yuki Fujiwara
Associate Professor	Maki Tanioka

Tadahiko Shien, MD, Ph.D, Associate Professor, the Director of the Department

Areas of Specialization	Breast disease, Thyroid disease
Research Field	Surgical treatment and drug therapy for breast cancer, Surgical treatment of thyroid/parathyroid disease
Qualification	medical doctor Japanese Surgical Society: Board Certified Member, Board Certified Doctor and Board Certified Medical Advisors Japanese Breast Cancer Society: Board Certified Member, Board Certified Doctor and Board Certified Medical Advisors Endocrine Surgery: Board Certified Doctor Japanese Society of Breast Oncoplastic Surgery: Breast Reconstruction Expander/Implant Physician Japanese Board of Cancer Therapy: General Clinical Oncologist The Japanese Society for Hereditary Tumors: familial oncologist Breast cancer screening ultrasound examination implementation / decision doctor Familial Oncology Coordinator
Councilor	Japanese Breast Cancer Society Japanese Association for Breast Cancer Screening Japan Society of Clinical Surgery Oncoplastic Surgery Society Japan Society of Endocrine Surgery Japanese Society of Clinical Oncology
Committee	Breast Cancer Society Public Relations Committee Breast Cancer Society Guidelines Committee Surgical Guidelines Committee Breast Cancer Society New Medical Specialist System Committee JCOG Breast Cancer Group Secretariat Breast Cancer Society Clinical Research Committee Breast Cancer Society Finance Committee Breast Cancer Screening Society Editorial Board Oncoplastic Surgery Society International Committee
appeal	Please feel free to contact us for anything you want.
Biography	1999 Graduated from Kagawa University School of Medicine 1999 Okayama University School of Medicine, Department of Oncology and Thoracic Surgery 2003 National Cancer Center Hospital, Surgical Resident 2005 Graduated from Okayama University School of Medicine (Surgery) 2006 National Cancer Center Hospital, Cancer specialist trainee 2008 Oncology and Thoracic Surgery, Okayama University, Assistant Professor 2008 14th Japanese Breast Cancer Society Research Encouragement Award 2009 3rd Breast Cancer Clinical Award Encouragement Award 2018 Okayama University Hospital, Breast and Endocrine Surgery, Lecturer, 2020 Okayama University, Research Associate Professor

Tsuguo Iwatani, MD, Ph.D, Associate Professor, Deputy Department, Ward Manager

Areas of Specialization	Breast cancer and Endocrine tumors (thyroid/parathyroid)
Research Field	Breast Oncology, Endocrine Oncology, Health Outcomes Research, Health Economics Evaluation
Qualification	Japanese Surgical Society: Board Certified Doctor Japanese Breast Cancer Society: Board Certified Doctor and Board Certified Medical Advisors Japanese Society of Endocrine Surgery: Board Certified Doctor Japanese Board of Cancer Therapy: General Clinical Oncologist Japanese Society of Breast Oncoplastic Surgery: Breast Reconstruction Expander/Implant Physician Japan Breast Cancer Screening Accuracy Management Organization: Certified Mammography Interpretation Physician, Examination Ultrasound Examination Physician Ministry of Health, Labor and Welfare Clinical training instructor course completed Ministry of Health, Labor and Welfare Completion of palliative care training
appeal	Our specialists work together as a team to provide the best medical care for everyone.
Biography	March 2003 Graduated from St. Marianna University School of Medicine April 2003 Toranomon Hospital Surgical Resident April 2007 St. Marianna University Hospital Breast and Endocrine Surgery Registered Physician April 2008 Toranomon Hospital Breast and Endocrine Surgery Specialist March 2012 Completed doctoral course at Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University June 2013 Study abroad at University College London Comprehensive Clinical Trials Unit January 2015 St. Marianna University School of Medicine Surgery (Breast and Endocrine Surgery) Assistant Professor April 2019 Breast Surgeon, National Cancer Center Hospital East September 2019 Medical Director, Breast Surgery, National Cancer Center Hospital East April 2022 Okayama University Hospital Mammary and Endocrine Surgery Associate Professor /Deputy Chief

Yuko Takahashi, MD, Ph.D, Assistant Professor

Areas of Specialization	Breast and Endocrine Surgery
Research Field	Development of new treatment and diagnostic methods for breast cancer, planning and implementation of clinical trials
Qualification	Japan Surgical Society: Board Certified Doctor Japanese Breast Cancer Society: Board Certified Doctor Japanese Society of Medical Oncology: Diplomate, Subspecialty Board of Medical Oncology, Board Certified Medical Advisors Japanese Board of Cancer Therapy: General Clinical Oncologist Japan Breast Cancer Screening Accuracy Management Organization: Screening mammography interpreter certified (AS) Breast cancer screening ultrasound examination implementation / decision doctor (A) Japanese Society of Breast Oncoplastic Surgery: Breast Reconstruction Expander/Implant Physician Ministry of Health, Labor and Welfare Clinical training instructor course completed Ministry of Health, Labor and Welfare Completion of palliative care training
Committee	Japanese Society of Clinical Oncology International Committee
appeal	We strive to provide the best possible medical care to each and every one of you.
Biography	March 2010 Graduated from Okayama University School of Medicine April 2010 Kameda Medical Center Early Resident April 2012 St. Luke's International Hospital, Breast Surgery, Senior Resident April 2015 St. Luke's International Hospital Breast Surgery Fellow April 2016 Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Doctoral Course. Department of Pathophysiology and Control Science Respiratory and Breast Endocrine Surgery Enrollment May 2016 Okayama University Hospital Breast and Endocrine Surgery Medical Staff October 2018 National Cancer Center Hospital Resident (JCOG) August 2019 European Organization for Research and Treatment of Cancer (EORTC) Fellow March 2020 Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Doctoral Course. Department of Pathophysiological Control Science Respiratory and Breast Endocrine Surgery Completed May 2020 Okayama University Hospital, Endocrinology Center, Assistant Professor April 2022 Okayama University Hospital, Breast and Endocrine Surgery, Assistant Professor

Shogo Nakamoto , MD, Clinical Fellow

Areas of Specialization	Breast and Endocrine Disease
Research Field	Analysis of real-world data
Qualification	Japanese Surgical Society: Board Certified Doctor Japanese Breast Cancer Society: Board Certified Member and Board Certified Doctor Japan Breast Cancer Screening Accuracy Management Organization: Screening mammography interpreter certified Breast cancer screening ultrasound examination implementation / decision doctor Japanese Board of Cancer Therapy: General Clinical Oncologist
appeal	We will continue to study and research to provide better treatments for patients.
Biography	March 2013 Graduated from Tottori University School of Medicine April 2013 Fukuyama Municipal Hospital, junior resident April 2015 Fukuyama Municipal Hospital Breast and Thyroid Surgery, senior resident April 2018 Shizuoka Prefectural Shizuoka Cancer Center, Breast Oncology April 2020 Fukuyama Municipal Hospital, Breast and Thyroid Surgery, Medical Director, April 2021 Entered Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Doctoral Course, Department of Disease Control Science, Department of Respiratory and Breast Endocrine Surgery October 2021 Okayama University Hospital Breast and Endocrine Surgery Medical Staff

Asuka Mimata, MD

Areas of Specialization	Breast and Endocrine Surgery
Research Field
Qualification	Japanese Surgical Society: Board Certified Doctor Japanese Breast Cancer Society: Board Certified Member Japan Breast Cancer Screening Accuracy Management Organization: Screening mammography interpreter certified
appeal	We will strive to provide the best medical care for everyone.
Biography	March 2017 Graduated from Okayama University School of Medicine April 2017 Japanese Red Cross Okayama Hospital, junior resident April 2019 Japanese Red Cross Okayama Hospital, senior resident April 2021 Okayama University Hospital Breast and Endocrine Surgery Medical Staff October 2021 Shikoku Cancer Center, Department of Breast Surgery, resident October 2023 Okayama University Hospital Breast and Endocrine Surgery Medical Staff

Maya Kosaka, MD

Areas of Specialization	Breast and Endocrine Surgery
Research Field
Qualification	Japan Breast Cancer Screening Accuracy Management Organization: Screening mammography interpreter certified,Breast cancer screening ultrasound examination implementation / decision doctor
appeal	We aim to provide the best possible medical care for patients.
Biography	Mar. 2020 Graduated from Kagawa University, Department of Medicine Apr. 2020 - Mar. 2022 Japanese Red Cross Society Himeji Hospital, Junior Resident Apr. 2022 - Mar, 2024 Japanese Red Cross Society Himeji Hospital, Senior Resident　 Apr. 2024 - Sep. 2024 Kurashiki Medical Center, Department of Surgery, Medical Staff Oct. 2024- present Okayama University Hospital, Department of Breast and Endocrine Surgery, Medical Staff

Yuki Fujiwara, MD

Areas of Specialization	Breast surgery
Research Field
Qualification	Certified physician to read screening mammograms,Completed palliative care workshop,Breast Reconstruction Expander/Implant Practitioner
appeal	I think that patients come to hospital with anxiety and hope. I will strive to be a part of the patient's lives and provide medical care that is not defeated by their feelings.
Biography	Mar. 2020 Graduation from Tottori University Apr. 2020 - Mar. 2022 Okayama University Hospital, Junior Resident Apr. 2022 - Mar, 2024 Hiroshima City Hiroshima Citizen Hospital, Senior Resident　 Apr. 2024 - Sep. 2024 Okayama Central Hospital, Senior Resident　 Oct. 2024 - current Okayama University Hospital, Department of Breast Surgery, Medical Staff

Maki Tanioka, M.D., PhD, Okayama University / Medicine, Dentistry and Pharmaceutical sciences, Institute of Academic and Research / Clinical AI Human Resources Development Program, Associate Professor

Areas of Specialization	Chemotherapy for breast cancer, gynecologic cancer, sarcoma, and unknown primary cancer
Research Field	Cancer research using artificial intelligence
Qualification	Japanese Society of Medical Oncology: Diplomate, Subspecialty Board of Medical Oncology, Board Certified Medical Advisors Japanese Breast Cancer Society: Board Certified Doctor Japanese Society of Internal Medicine: Board Certified Physician
Councilor	Japanese Society of Clinical Oncology
appeal	We are committed to providing the best possible medical care while empathizing with each and every one of you.
Biography	2003 Graduated from Hiroshima University School of Medicine 2003 Kyoto University School of Medicine, Resident 2004 Shonan Kamakura General Hospital, Department of General Internal Medicine 2006 National Cancer Center Hospital, Department of Internal Medicine, Resident 2009 Hyogo Cancer Center, Chief of Medical Oncology 2013 Graduated from Kobe University Graduate School (Oncology and Hematology) 2014 University of North Carolina at Chapel Hill Postdoctoral Fellow (Charles Perou) 2018 National Cancer Center Hospital, Medical Oncologist 2021 Okayama University / Medicine, Dentistry and Pharmaceutical sciences, Institute of Academic and Research / Clinical AI Human Resources Development Program, Associate Professor