The Fukushima Daiichi nuclear accident was one of the major consequences of the quake and tsunami on March 11th 2011 that left more than 15,000 people dead in Japan.
Reuters reports that as some of the towns near Fukushima re-open, those paving the way for returning residents often see boars strolling the streets.
For the last six years, the streets of the towns abandoned in the wake of the Fukushima disaster have been walked, not by people, but by wild, radioactive boars.
The organisation says that evacuation orders in much of the "heavily contaminated" village of Iitate - around 40km from the damaged nuclear plant - will be lifted by the end of the month.
One problem: the area has since been overtaken by hundreds of radioactive wild boars!
There has been a 20-kilometer exclusion zone around the Fukushima nuclear plant since the disaster.
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Speaking to the Mirror, Tamotsu Baba, mayor of the town said, "It is not really clear now which is the master of the town, people or wild boars".
Shoichiro Sakamoto, a local hunter who leads the wild boar team, told Reuters that the animals aren't afraid of people now. They occasionally attack humans.
However, the contaminated boars, some of which have shown levels of radioactive elements 300 times higher than safety standards, are giving officials reason to worry.
Reports state that teams of hunters have been dispatched to cull the boars from the towns of Namie and Tomioka. The Washington Post reported a year ago on the animals, noting that scientists have found no evidence that the boars have any ill effects from radioactivity in their systems. More than half of the 21,500 former residents have decided not to return, citing concerns over radiation and the safety of ongoing operations at the nuclear plant, which is now being decommissioned.
"After people left, they began coming down from the mountains and now they are not going back", he said.