Possibly, though the half life on that shit is extreme. Their houses and cars should still be laced with the stuff, just as fukashima and the surrounding towns still are (and that is WITH cleanup mitigation efforts).
Wherever the stuff is, it's probably just as radioactive as ever, but after more than 10 years of wind and rain, it should have blown/washed away from most places. Maybe it would accumulate in some places such as rivers. That would be a place to look.
You could have checked with a geiger counter in 2011 or 2012. By now the only remaining trace would be the hypothesized brain damage.
Possibly, though the half life on that shit is extreme. Their houses and cars should still be laced with the stuff, just as fukashima and the surrounding towns still are (and that is WITH cleanup mitigation efforts).
Wherever the stuff is, it's probably just as radioactive as ever, but after more than 10 years of wind and rain, it should have blown/washed away from most places. Maybe it would accumulate in some places such as rivers. That would be a place to look.