Environmental remediation

CLADS' efforts toward environmental remediation

At CLADS, in collaboration with Fukushima Prefecture and National Institute for Environmental Studies, we are actively conducting research and development and support activities toward environmental remediation and an early return of residents to their homes in "Fukushima." Results of research and development will be shared as science-based information utilized to make municipal plans for community rebuilding and for efforts toward the regeneration of agriculture, forestry, and fisheries.


To understand the behavior dynamics of residual radioactive materials in mountainous and forested areas caused by water flow and wind, we first acquire data through field surveys and laboratory experiments. Thereafter, we examine the process of the transfer of radioactive materials to residential areas and oceans.


We are developing measurement techniques for various environments, such as lands, rivers, and oceans, and examining the distribution and transfer of radioactive materials. We are also developing a new measurement technique where details of radiation can be visualized in places closely associated with living environment such as in and outside of a home.

Introduction to environmental remediation research

  • Exposure dose predictions that consider the behavior of radioactive materials in inland waters
  • A study on the form of radioactive cesium in trees
  • Development of a metal particle identification method through an efficient liquid phase collection of nano/micro-colloids dispersed in water and transmission electron microscopy (TEM)
  • A study on the transfer behavior of radioactive cesium through organic matter decomposition
  • Assessment of waste inventory using soil outside a specified nuclear power plant
  • Assessment of dispersion of airborne radioactive dust
  • Elucidation of nuclide migration behavior in surface environments using solid phase analysis and the improvement of a migration model
  • Establishment of an analytical method for trace cesium and strontium to understand their behavior in an ecosystem
  • Measurement of radiation using a germanium semiconductor detector with quality assurance
  • Development of an infrastructure to share study results and exchange information
  • Whole-body counter (WBC) surveys for the Fukushima Health Management Survey
  • Multi-layered monitoring and exposure assessment at Specified Reconstruction and Revitalization Base
  • Behavior of and temporal changes in radioactive cesium in marine environments
  • Behavior of and temporal changes in radioactive cesium in Inland water environments
  • Behavior of and temporal changes in radioactive cesium in Urban environments
  • Development of nuclear power disaster prevention tools (Marine)