The 8th Annual Symposium

Director Nanba giving opening remarks

Date & Time

Oral presentation for experts: 13:00-17:40 on Monday, February 28, 2022
Symposium for the General Public: 13:00-17:00 on Tuesday, March 1, 2022
Poster presentation materials are published on the special website of the symposium between February 28, 2022 and March 1, 2022.


Fukushima Post-Accidental Contamination ~Consequences and long-term trends~

Abstracts are available for download from the button below.

The IER holds an annual symposium every year to report research results to the general public and experts and to exchange opinions. The 8th annual symposium was held on February 28 and March 1, 2022, with the theme “Fukushima Post-Accidental Contamination ~Consequences and long-term trends~”. Although the event was originally planned to be held as a hybrid event on-site and online, it changed to an online event due to the spread of infections of COVID-19. We received a lot of registration for participation and a total of approximately 220 people joined the oral presentation for experts and the symposium for the general public.

Program of the Oral Presentation for Experts, 28th February
TimeProgram・Presentation TitleSpeakerAffiliation
13:00-13:05Opening RemarksNANBA KenjiDirector, IER Professor / Faculty of Symbiotic Systems Science
13:05-13:35Long term behavior of 137Cs and tritium derived from atmospheric nuclear weapons tests and other sources in the North Pacific and the Japan Sea since the 1960s and futureAOYAMA MichioCenter for Research in Isotopes and Environmental Dynamics, University of Tsukuba
Visiting Professor,IER
13:35-14:05Return of the Fukushima-derived radiocesium along with the anticlockwise subarctic gyre current in the North Pacific OceanKUMAMOTO YuichiroJapan Agency for Marine-Earth Science and Technology
14:05-14:35Comparison of cesium-bearing microparticles from marine and terrestrial sourcesMIURA HikaruCentral Research Institute of Electric Power Industry
14:45-15:15A comparative study of riverine 137Cs dynamics during high-flow events at three contaminated river catchments in FukushimaWAKIYAMA YoshifumiAssociate Professor, IER
15:15-15:45Long-term trends in radiocesium dynamics in Fukushima forestsVasyl YOSCHENKOProfessor, IER
15:45-16:15Characteristics of immobile radiocesium-bearing particles in soilsYAMAGUCHI NorikoInstitute for Agro-Environmental Sciences, National Agriculture and Food Research Organization
16:25-16:50Estimation of rooting depth of 137Cs uptake by plantsNGUYEN Phuong ThoaGraduate School of Symbiotic Systems Science and Technology, Fukushima University
16:50-17:20Introgression of invasive pig genes into wild boar following the Fukushima events in 2011Donovan ANDERSONCenter for Research in Isotopes and Environmental Dynamics, University of Tsukuba
17:35-17:40Closing RemarksTAKAMURA NoboruVice Director, IER
Professor, Nagasaki University
Program of the Symposium for the General Public, 1st March
TimeProgram・Presentation TitleSpeakerAffiliation
13:00-13:05Opening RemarksNANBA KenjiDirector, IER
Professor, Faculty of Symbiotic Systems Science
13:10-13:35Findings and issues in environmental radioactivity research
13:35-14:05Approaches to overcome the challenges in safe processing of Fukushima-derived wasteIsmail RAHMANAssociate Professor, IER
14:15-14:45Tritium in the vicinity of Fukushima Daiichi Nuclear Power Plant and the coastal region around JapanTAKATA HyoeProject Associate Professor, IER
14:45-15:15Predictions of long term trends in the Fukushima post accidental river water contaminationMark ZHELEZNYAKProject Professor, IER
15:25-15:55Radiation effects on wildlife inhabiting difficult to return zonesISHINIWA HirokoProject Assistant Professor, IER
15:55-16:25Activity concentrations of radiocaesium and 129I in agricultural crops, and internal radiation doses from ingestionTSUKADA HirofumiProfessor, IER
16:25-16:55DiscussionFacilitator:WADA ToshihiroAssociate Professor, IER
16:55-17:00Closing RemarksAlexei KONOPLEVVice Director / Project Professor, IER

In the symposium for the general public, six IER professors gave presentations about their findings acquired in the research activities following the nuclear accident in 2011. Participants asked questions such as “What do you think that the number of analysis samples is limited?” and “Aren’t there any effects of the accident-derived radionuclides on wild animals now?” Many questions about tritium given by online participants suggested that people are very interested in the discharge of the ALPS treated water from Fukushima Daiichi Nuclear Power Plant. At last of the symposium, all six presenters shared their views on issues that need to be addressed.

The poster presentation was held on the special website of the symposium. Registered participants can view and listen to 32 posters presentations with audio commentaries until March 31, 2022. We hope we hold this event on-site next year so that participants can directly exchange opinions in person with each other.

Thank you very much for your participation in the annual symposium!

Dr. Aoyama giving a presentation online
Prof. Wakiyama giving a presentation
Prof. Yoschenko giving a presentation
Photo shooting after the first day
Prof. Takata giving a presentation
Prof. Ishiniwa giving a presentation
Discussion time of the symposium for the general public
Photo shooting after the second day