Takeshi Iimoto / Associate Professor / Division of Environmental Studies
Department of Environment Systems / /

Career Summary
Mar. 1991 Graduated from Waseda University
Mar. 1996 Completed Ph.D. program of Waseda University

Apr. 1996: Researcher, Waseda University
Jun. 1996: Researcher, National Institute of Radiological Sciences, Japan
Sep. 1996: Researcher, The University of Tokyo
Apr. 1998: Researcher, Central Research Institute of Electric Power Industry, Japan
Jun. 1998: Assistant Professor, The University of Tokyo
Nov. 2007: Associate Professor, The University of Tokyo

Educational Activities
Graduate School of Frontier Sciences (GSFS):
- Management of Radiation Risk

Research Activities
We encounter radiation in various environments and situations. Examples include natural radiation that has existed from ancient times, artificial radiation that is used in the medical and industrial fields, radioactive wastes, and radioactively contaminated environments after the TEPCO Fukushima Daiichi nuclear power plant accident. Although it is undeniable that radiation for medical diagnosis in hospitals or inspection in airports is quite useful, we are also concerned about the risk of radiation from radiation exposure.
gRadiation environmenth is a typical example of an environment system relating to both humans and surrounding society. Our research field gEnvironmental Safety Managementh covers all studies on safety and risk management, mainly in radiation environments. The keywords of our research are gradiation and radioactive materialsh and gradiological protectionh. We pursue studies from the viewpoints of both natural and social sciences.
Our main research targets are:
1) Development of methods for radiation measurement and dosimetry
2) Study of safety measures for radiation applications and the management of radioactive waste materials
3) Study of natural radiation environments and naturally occurring radioactive materials
4) Study of environmental protection and environmental assessment pertaining to radiation
5) Study of risk management, risk communication, etc.

Our research themes are selected from timely discussion points and needs relating to the activities of IAEA, UNSCEAR, ICRP, and regulatory science in Japan.

1) T. Iimoto, J. Nunokawa, H. Fujii, R. Takashima, M. Hashimoto, T. Fukuhara, T. Yajima, H. Matsuzawa, K. Kurosawa, Y. Yanagawa, and S. Someya: Collaboration of Local Government and Experts Responding to Increase of Environmental Radiation Level Due to The Nuclear Disaster-Focusing on Their Activities and Latest Radiological Discussion, Radiation Protection Dosimetry (2015), pp. 1-7, Advance Access published May 16, 2015, ID: ncv279 (2015).
2) Takeshi Iimoto, Eriko Hayashi, Keiji Kimura, Takahiko Suzuki, Asaya Kobashi, and Satoru Tanaka: Optimized Safety Management for X Ray Irradiators with Various Levels of Potential Exposure Risk Used for Research, Radiation Emergency Medicine Vol. 3, No. 1, 45-49 (2014).
3) T. Iimoto and T. Kosako: Discussion on Framework of Radon Management Strategy in Various Environments, Radiation Protection Dosimetry, 146, Nos. 1-3, 217-220 (2011).
4) T. Iimoto, Y. Akasaka, Y. Koike, and T. Kosako: Development of a Technique for the Measurement of the Radon Exhalation Rate Using an Activated Charcoal Collector, Journal of Environmental Radioactivity, 99(4), 587-595 (2008).
5) T. Iimoto, K. Kawashima, and T. Kosako: Using an Imaging Plate to Measure the Concentration of Radon Progeny in Air, RADIOISOTOPES, 53, 9, 461-468 (2004).

Other Activities
Japan Health Physics Society
Japanese Society of Radiation Safety Management
Atomic Energy Society of Japan
The Institute of Electrical Engineers of Japan

Future Plan
Environmental safety management, which is one of the practical sciences based on real scene viewpoints, covers specific research issues, especially those pertaining to radiation protection and safety control. I believe our approach to environmental safety management can also be applied to additional environment safety fields other than radiation.
My perspectives on planning the radiation safety management strategy in our university as a member of the Division for Environment, Health and Safety, as well as my focus on the regulatory scientific point of view to ensure the safety and security of citizens, are the foundation of this practical science research. I would like to make a social contribution through the development of superior human resources with a sense of balance by our research and educational activities.

Messages to Students
Our main focus on "radiation protection" is strongly related to natural science based on Science and Technology, Engineering, Mathematics (STEM) as well as to social science. We feel the ability to listen to and understand othersf opinions, and the ability to convey onefs claim properly to others from the standpoint of onefs own expertise, are crucial. Letfs cultivate such abilities together in our laboratory activities.