Tomoki Nakamizo


Department of Clinical Studies, Nagasaki


Dr. Nakamizo has been an Associate Senior Scientist of the Department of Clinical Studies since January 2019. As a neurologist, he has professional experience of clinical practice and research in neurology and in public health. His current research interests lie mainly in the area of radiation-associated atherosclerosis as well as comprehensive evaluation of biomarkers including radiomics. He is a board-certified neurologist of the Japanese Society of Neurology, board-certified internist of the Japanese Society of Internal Medicine, and board-certified physician of the Japan Stroke Society.


M.P.H. (Biostatistics, MPH-equivalent certification by Ministry of Health, Labor, and Welfare, Japan) National Institute of Public Health, Wako, Saitama, Japan
Ph.D. (Medicine) Graduate School of Medicine, Kyoto University, Kyoto, Japan
M.D. Faculty of Medicine, Kyoto University, Kyoto, Japan


Radiation Effects Research Foundation, Department of Clinical Studies, Nagasaki
  • 2022–

    Senior Scientist

  • 2020–

    Chief, Division of Radiology

  • 2019–2021

    Associate Senior Scientist

Professional and Fellowship
  • 2015–2018

    Department of Neurology, Yokohama Brain and Spine Center, Yokohama, Kanagawa, Japan

  • 2012–2015

    Department of Neurology, Hiratsuka City Hospital, Hiratsuka, Kanagawa, Japan

  • 2009–2012

    Department of Health Care Safety and Department of Health Care Policies, Yokohama Public Health Center, Yokohama, Kanagawa, Japan

  • 2005–2009

    Department of Neurology, Yokohama Stroke and Brain Center, Yokohama, Kanagawa, Japan

  • 2003–2005

    Department of Neurology, Hikone Municipal Hospital, Hikone, Shiga, Japan

  • 1997–1999

    Clinical Fellow in Neurology, Sumitomo Hospital, Osaka, Japan

  • 1994–1997

    Resident in Neurology, Hamamatsu Rosai Hospital, Hamamatsu, Shizuoka, Japan

  • 1994

    Resident in Neurology, Kyoto University Hospital, Kyoto, Japan

Selected publications

Nakamizo T, Cologne J, Cordova K, Yamada M, Takahashi T, Misumi M, Fujiwara S, Matsumoto M, Kihara Y, Hida A, Ohishi W. Radiation effects on atherosclerosis in atomic bomb survivors: a cross-sectional study using structural equation modeling. Eur J Epidemiol. 2021;36:401-414.
Nakamizo T, Kanda T, Kudo Y, Sugawara E, Hashimoto E, Okazaki A, Usuda M, Nagai T, Hara H, Johkura K. Effects of uncomfortable care and histamine H2-antagonists on delirium in acute stroke: A propensity score analysis. J Neurol Sci. 2021;420:117251.
Nakamizo T, Kanda T, Kudo Y, Sugawara E, Hashimoto E, Okazaki A, Usuda M, Nagai T, Hara H, Johkura K. Development of a clinical score, PANDA, to predict delirium in stroke care unit. J Neurol Sci. 2020;415:116956.
Nakamizo T, Yamamoto M, Johkura K. Changes in stroke risk by freedom-from-stroke time in simulated populations with atrial fibrillation: Freedom-from-event effect when event itself is a risk factor. PloS one 2018;13:e0194307.
Arai N, Nakamizo T, Ihara H, Koide T, Nakamura A, Tabuse M, Miyazaki H. Histamine H2-Blocker and Proton Pump Inhibitor Use and the Risk of Pneumonia in Acute Stroke: A Retrospective Analysis on Susceptible Patients. PLoS One. 2017;12(1): e0169300.
Nakamizo T, Yamamoto M. Stroke-free duration and stroke risk in patients with atrial fibrillation: simulation using a Bayesian inference. Asian Biomedicine 2009;3(4); 445-50.