Head Investigator
Yuichi ONDA： A03-5　（University of Tsukuba・Hydrogeomorphology)

The coordination committee consists of principal leader of all study groups and team leader of each database and analysis working group. We are to support and help strengthen the connection of public research teams and proposed research teams in order to proceed this project efficiently.
Since dealing with a wide range of field such as Radiochemistry in addtion to various fields of Geoenvironmental sciences, we constract a system to produce many ingenious achievements by linking eight proposed research teams and public research and encouraging mutual enlightenment between the high-capacity individual researchers.
We also preside over all support activity and seminar to help each proposed research team proceed their study by working closely with other proposed research teams and public research teams.
Because we will be the center of new research area, we have to have a multifaceted perspective and strive to nurture the young researchers that can actively exchange opinions with researchers in different fields.

Principal Investigators
Teruyuki NAKAJIMA： A01-1　(Japan Aerospace Exploration Agency・Meteorology)
Yasuhito IGARASHI： A01-2　(Meteorological Research Institute・Atmospheric aerosol)

―Proposed Research(1)(2)
・Understand and recreate the processes of atmospheric transport, deposition, and diffusion of radionuclides by using multiple atmospheric transport models of radionuclides in the global scale from the small scale.

・Investigate the time of concentration, spatial variability, and type of radionuclides contained in atmospheric aerosol that are collected during the implementation period from immediately after the accident.

・Simulate the interaction of radionuclide migrated between atmosphere and land by understanding and recreating the re-entrainment processes of radionuclides deposited within soil and ecosystems.

Principal Investigators
Masatoshi YAMADA： A02-3　(Hirosaki University・Oceanography)
Jota KANDA： A02-4　(Tokyo University of Marine Science and Technology・Marine biology)

―Proposed Research(3)(4)　
・Collect seawater, sea sediment, and marine life in Japanese coast and North Pacific area and understand the condition and factor of the radionuclide distribution therein.

・For radionuclides from sea and sea floor, the physical process will be mutually examined and simulated. ・Investigate of the concentration process of radionuclides contained in marine life and contribute to the future estimation.

Principal Investigators
Yuichi ONDA： A03-5　（University of Tsukuba・Hydrogeomorphology)
Chisato TAKENAKA： A03-6　(Nagoya UNiversity・Forest environment resources)

―Proposed Research(5)(6)
・Make observations and future estimations of radionuclides migrated with water and sediment from soil and plants to groundwater, river, and river ecosystems in and around the planned evacuation area.

・Estimate the deposition of fallout radionuclide at the time of accident based on understanding the quantity and form of radionuclides using GIS and meteorological data to obtain initial model data and identity data.

・For the steady circulation of radioactive cesium deposited in forest and forest ecosystem and also the diffusion to the outside of ecosystems, construct its circulation process models and elucidate its mechanism.

Principal Investigators
Masayoshi YAMAMOTO： A04-7　(Kanazawa University・Environmental radioactivity)
Atsushi SHINOHARA： A04-8 & Analysis Team leader　(Osaka University・Radiochemistry)

―Proposed Research(7)(8)
・Develop the technology to measure trace amount of radionuclides and elucidate its chemical form in the transition process by taking full advantage of existing equipment and new advanced micro-measurement technology.

・In cooperation with the coordination committee, provide assistance to A01-A03 in the measurement of research items.

・With understanding the actual condition of radionuclides diffused by Fukushima Daiichi NPP accident, measure and make future estimation of how each radionuclide migrates and what type of chemical form it takes in the environment. Also, provide assistance to A01-A03 in the measurement of research items.

B01: Estimation of deposition process of radionuclides based on the investigation, analysis and clarification of chemical status at the time of release and impact assessment of transfer [A01, A04] (Chief: Dr. Igarashi)

B02: Clarification of circulation process of radionuclides in forest environment and modeling of the process [A01, A03, A04] (Chief: Dr. Takenaka)

B03: Clarification of transfer process of radionuclides from terrestrial environment to marine environment through river network [A02, A03, A04] (Chief: Dr. Onda)

B04: Calculation of locational radiation exposure based on radionuclide behavior and transfer in the environment [A01, A02, A03, A04] (Chief: Dr. Tsuruta)