Hiroko Ishiniwa

Project Lecturer

Institute of Environmental Radioactivity Radioecology division, field wildlife research


I received my Ph.D. from Niigata University for research about effect of dioxins on the large Japanese field mouse. Currently, I am studying about effect of radiation exposure on the large Japanese field mouse.


  • Effect of radiation exposure on the Japanese field mouse using oxidative stress markers.
  • Effect of radiation exposure on DNA mutation in the next generations.
  • Mechanism of Cesium accumulation in the large Japanese field mouse.
  • Factors to create sexual difference in seasonal breeding in mammals.

Fields of Research

Molecular Ecology, Ecotoxicology


Radiation, the large Japanese field mouse, gene

Research Overview

Since 2013, I started to study the effects of radiation on the large Japanese field mouse at National Institute for Environmental Studies. When organisms receive the radiation, a possibility is occurred that DNA is oxidized and mutation is induced. On the other hand, organisms have mechanisms to repair the damage such as oxidation. So, I investigate whether oxidative stress and DNA mutation are actually occurred in mice living in restricted area. Even after I arrived to Fukushima, I continue this research.

A few words

I visit to various place in Fukushima to investigation. I am deeply moved by beautiful view of mountain ranges and Satoyama.
After the Fukushima nuclear power plant accident in 2011, many animals and plants excepted for human are living in restricted area that is contaminated by radioactive materials. I would like to clarify and sent out how are they affected and surviving.

Personal Interest

Fruits, Reading, Jogging

Curriculum vitae


Ph.D, Niigata University


Internship researcher, Niigata University


Doctoral researcher, Niigata University


Research associate, National Institute for Environmental Studies


Project Assistant Professor, Fukushima University