In the present day, wildlife is facing various threats due to environmental changes and global human influence. Research into human–wildlife interactions contributes to the coexistence between wildlife and humans (i.e., ecology, conservation, and management). I focus on the fields of radioecology and molecular ecology to contribute to understanding radiation dynamics and the changes in wildlife ecology following nuclear power plant (NPP) accidents. 
Such accidents result not only in radioactive contamination but also in large-scale land abandonment, which can lead to effects on wildlife ecology and population dynamics.
  I use molecular ecological methods (i.e., DNA analyses) to investigate wildlife diet, genetic population structure, and dispersal patterns. These ecological traits influence radionuclide uptake and factors driving individual variation in radioactive contamination levels.

  Some studies have reported increases in wildlife populations and changes in their activity patterns within evacuation zones after NPP accidents. Similar phenomena, driven by reduced human activity, may also emerge in depopulating rural areas in the near future. Therefore, wildlife ecological studies after the NPP accident are necessary to consider both radioactive contamination/dynamics and human absence when evaluating long-term ecological impacts, contributing to strategies for sustainable human–wildlife coexistence.