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

Breast and Endocrinological Surgery

Staff Introduction/Outpatient Days

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	Monday	Tuesday	Wednesday	Thursday	Friday
AM	Monday Maki Tanioka Takahiro Tsukioki	Tuesday Tadahiko Shien Yuko Takahashi Maki Tanioka	Wednesday Shogo Nakamoto	Thursday Tadahiko Shien Yuko Takahashi	Friday Shogo Nakamoto Takahiro Tsukioki
PM						Monday Maki Tanioka Takahiro Tsukioki	Tuesday Tadahiko Shien Yuko Takahashi Maki Tanioka	Wednesday Shogo Nakamoto	Thursday Tadahiko Shien Yuko Takahashi	Friday Shogo Nakamoto Takahiro Tsukioki

Staff Introduction

	Name
Associate Professor	Tadahiko Shien
Assistant　Professor	Yuko Takahashi
Medical Staff	Takahiro Tsukioki
Medical Staff	Shogo Nakamoto
Medical Staff	Asuka Mimata
Medical Staff	Shutaro Kato
Medical Staff	Reina Maeda
Medical Staff	Maya Kosaka
Medical Staff	Yuki Fujiwara
Medical Staff	Yuki Narahara
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

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

Takahiro Tsukioki, M.D. PhD.
Graduated from Tottori University in 2010

Areas of Specialization	Breast and Thyroid Diseases
Research Field	Development of breast cancer risk prediction models; breast cancer prevention; establishing optimal screening methods for BRCA mutation carriers
Qualification	Doctor of Medical Science (Ph.D.) Board-Certified Surgeon, Japan Surgical Society Certified Breast Surgeon, Japan Breast Cancer Society Certified Mammography Reader Committee Member: Breast Cancer Treatment Guidelines Subcommittee on Surgical Therapy Systematic Review Committee
appeal	I strive to provide the best possible medical care to all patients and support them in overcoming illness.
Biography	March 2010 Graduated from Tottori University April 2010 Residency and fellowship at Fukuyama City Hospital October 2014 Domestic fellowship at Cancer Institute Hospital of JFCR March 2015 Returned to Fukuyama City Hospital August 2016 Clinical Fellow at Okayama University Hospital Enrolled in the Doctoral Program, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University April 2018 Assigned to Nagashima Aiseien Sanatorium July 2020 Studied abroad at Northwestern University, Department of Breast Cancer Surgery Postdoctoral Fellowship August 2022 Assistant Professor, Endocrine Center, Okayama University

Shogo Nakamoto, M.D. PhD.
Graduated from Tottori University in 2013

Areas of Specialization	Breast and Thyroid Diseases
Research Field	Real-world Data Analysis
Qualification	Board Certified Surgeon of the Japan Surgical Society, Board Certified Member of Japanese Breast Cancer Society, Board Certified General Clinical Oncologist by the Japanese Board of Cancer Therapy
appeal	I am committed to continuous learning and research to provide the best possible treatment for my patients.
Biography	Mar. 2013 Graduated from Faculty of Medicine, Tottori University Apr. 2013 Resident, Fukuyama City Hospital Apr. 2018 Department of Breast Oncology, Shizuoka Cancer Center Apr. 2020 Department of Breast and Thyroid Surgery, Fukuyama City Hospital Oct. 2021 Department of Breast and Endocrine Surgery, Okayama University Hospital Sep. 2022 Department of Surgery, Tsuyama Chuo Hospital Apr. 2024 Department of Surgery, National Sanatorium Oku-Komei-en Apr. 2025 Assistant Professor, Endocrine Center, Okayama University Hospital

Asuka Mimata, MD
Graduated from Okayama University in 2017

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

Shutaro Kato, M.D.
Graduated from Tokushima University in 2017

Areas of Specialization	Breast and Endocrine surgery
Research Field
Qualification	surgical specialist
appeal	We aim to be a doctor trusted by patients.
Biography	Mar. 2017 Graduation from Tokushima University Apr. 2017 - Mar. 2019 NHO Okayama medical center, Junior Resident Apr. 2019 - Sep, 2019 NHO Shukoku medical center for children and adults, Senior Resident Oct. 2019 - Mar. 2023 NHO Okayama medical center, Senior Resident Apr. 2023 - Mar. 2025 Kagawa prefectural central hospital, Department of Cardiovascular Surgery, Medical Staff Apr. 2025 - current Okayama University Hospital, Department of Breast and Endocrine Surgery, Medical Staff

Reina Maeda, M.D.
Graduated from Okayama University in 2017

Areas of Specialization	Breast surgery
Research Field
Qualification	Japan Surgical Society: Board Certified Doctor Japanese Breast Cancer Society: Board Certified Doctor Japan Breast Cancer Screening Accuracy Management Organization: Screening mammography interpreter certified Breast cancer screening ultrasound examination implementation / decision doctor Japanese Society of Breast Oncoplastic Surgery: Breast Reconstruction Expander/Implant Physician
appeal	We strive to provide warm and compassionate care tailored to each patient. Please feel free to share any concerns, questions, or requests you may have.
Biography	Mar. 2017 Graduation from Okayama University Apr. 2017 - Mar. 2019 Hiroshima City Hiroshima Citizens Hospital, Junior Resident Apr. 2019 - Apr. 2020 Hiroshima City Hiroshima Citizens Hospitall, Senior Resident　 Jul. 2020 - Sep. 2020 Hiroshima Teishin Hospital, Senior Resident Oct. 2020 - Mar.2021 Okayama University Hospital, Department of Breast and Endocrine Surgery, Senior Resident Apr. 2021 - Mar. 2022 Hiroshima City Hiroshima Citizens Hospitall, Senior Resident　 Apr. 2022 -Mar. 2025 Hiroshima City Hiroshima Citizens Hospitall, Medical Staff Apr. 2025 - current Okayama University Hospital, Department of 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

Yuki Narahara
Graduated from Tottori University in 2020

Areas of Specialization	Breast and Endocrine Surgery
Research Field
Qualification
appeal	I strive to provide patient-centered medical care.
Biography	Mar. 2020 Graduation from Tottori University Apr. 2020 - Mar. 2022 Okayama Saiseikai General Hospital , Junior Resident Apr. 2022 - Mar, 2024 Okayama Saiseikai General Hospital , Senior Resident Apr. 2024 - Sep, 2024 Okayama University Hospital, Department of Breast and Endocrine Surgery, Medical Staff Oct, 2024 - Mar,2025 Okayama central Hospital Breast Surgery Apr,2025 - current Okayama University Hospital, Department of Breast and Endocrine Surgery, Medical Staff Okayama Unuversity Graduate School of Medicine, Dentistry and Pharmaceutical Sciences enter

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 2025 Okayama University Hospital, Clinical Cancer Center, Research Associate Professor