Welcome to ERAN

What is ERAN?

ERAN (Environmental Radioactivity Research Network Center)  has been recognized by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) as a Joint Usage / Research Center since 2019.
ERAN consists of six organizations: CRiED of Univ. of Tsukuba, IER of Fukushima Univ., and IREM of Hirosaki Univ. as network centers, and JAEA, QST, and NIES as cooperative network centers.
We are convinced that the results of the joint research and international efforts will be critical to the recovery and possible future events.

Pick Up Topic

Abundance and distribution of radioactive cesium-rich microparticles released from the Fukushima Daiichi Nuclear Power Plant into the environment

Chemosphere Volume 241, February 2020, 125019 .
Ikehara, R., Morooka, K., Utsunomiya, S., et. al,

Through analysis of 20 soil samples with the QCP method, we present the first regional-scale quantitative map of CsMP abundance and RF values around the FDNPP. This approach improves overall understanding of the dynamics, growth of the radioactive plume from FDNPP and the quantity of CsMPs deposited on the surrounding land, including residential areas. However, CsMPs in residential areas at present have experienced varying environmental conditions, such as being surrounded by vegetation, concrete, and buildings, and this may profoundly increase CsMP mobility by being washed out from the surfaces. 

Hot Topics


Sakuma, K., Yoshimura, K., Nakanishi, T ., Leaching characteristics of 137Cs for forest floor affected by the Fukushima nuclear accident: A litterbag experiment, Chemosphere Volume 264, Part 1, 128480 10.1016/j.chemosphere.2020.128480


Katengeza, W, E., Sanada, Y., Yoshimura, K., Ochi, K., Iimoto, T ., The ecological half-life of radiocesium in surficial bottom sediments of five ponds in Fukushima based on in situ measurements with plastic scintillation fibers, Environ. Sci.: Processes Impacts, 2020,22, 1566-1576, 10.1039/D0EM00160K


Otosaka, S., Kambayashi, S., Fukuda, M., Tsuruta, T., Misonou, T., Suzuki,T., Aono,T., Behavior of Radiocesium in Sediments in Fukushima Coastal Waters: Verification of Desorption Potential through Pore Water, Environmental Science & Technology, 54, 21, 13778–13785, October 19, (2020)


Onda, Y., Taniguchi, K., Yoshimura, K., Kato, H., Takahashi, J., Wakiyama, Y., Coppin, F., Smith, H., Radionuclides from the Fukushima Daiichi Nuclear Power Plant in terrestrial systems, Nature Review Earth and Environment (2020)


Takata, H., Aono, T., Aoyama, M., Inoue, M., Kaeriyama, H., Suzuki, S., Tsuruta, T., Wada, T., Wakiyama, Y., Suspended particle–water interactions increase dissolved 137Cs activities in the nearshore seawater during typhoon Hagibis, Environmental Science & Technology, August 2020


Begum, Z.A., Rahman, I.M.M., Ishii, K., Tsukada, H., Hasegawa, H., Dynamics of Strontium and geochemically correlated elements in soil during washing remediation with eco-complaint chelators, Journal of Environmental Management, Vol 259, April 2020, 110018


Teramage, M. T., Onda, Y., Kato, H., Sun, X. Impact of forest thinning on the dynamics of litterfall derived 137Cs deposits in coniferous forest floor after Fukushima accident, Chemosphere Volume 239, January 2020, 124777


Kurihara, E., Takehara, M., Suetake, M., Ikehara, R., Komiya, T., Morooka, K., Takami, R., Yamasaki, S., Ohnuki, T., Horie, K., Takehara, M., Law, G.T.W., Bower, W., W. Mosselmans, J.F., Warnicke, P., Grambow, B., Ewing, R.C., Utsunomiya, S., Particulate plutonium released from the Fukushima Daiichi meltdowns, Science of the Total Environment, Vol 743, Mar 2020, 140539 (2020)


Omori, Y., Tamakuma, Y., Nugraha, E.D., Suzuki, T., Saputra, M.A., Hosoda, M., Tokonami, S., Impact of wind speed on response of diffusion-type radon-thoron detectors to thoron, International Journal of Environmental Research and Public Health, Vol 17, 9, 1 May 2020, 3178


Taniguchi, K., Onda, Y., Smith, H.G., Blake, W., Yoshimura, K., Yamashiki, Y., Kuramoto, T., Saito, K. Transport and Redistribution of Radiocesium in Fukushima Fallout through Rivers, Environmental Science & Technology, 53, 21, 12339–12347, Sep, 2019


Wakiyama, Y., Onda, Y., Yoshimura, K., Igarashi, Y., Kato, H. Land use types control solid wash-off rate and entrainment coefficient of Fukushima-derived 137Cs, and their time dependence, Journal of Environmental Radioactivity Volume 210, December 2019, 105990

Hot Topics一覧へ→


2020.08.25    Our website has been updated‼
2020.05.20   2020 ERAN Kick-off Meeting was held.
2020.04.05   Annual Report meeting of 2019 was held.
2020.02.26   Notice of WEB Annual Meeting of 2019.


Past News→