KORIYAMA, Japan — For Hiroyoshi Yaginuma, the typhoon may well be the straw that breaks his back.

On Monday, Mr. Yaginuma, 49, a third-generation owner of an auto body shop in Fukushima Prefecture, was cleaning out the wreckage from Typhoon Hagibis, which battered Japan over the weekend and killed more than 70 people. The typhoon had brought record-setting rains that caused a levee to break on a nearby river, unleashing floodwaters that filled the first floor of his building, destroying everything.

It was only two years ago that Mr. Yaginuma finally finished paying off a $185,000 loan he had taken out to rebuild his shop in Koriyama, an industrial city in Fukushima, after it was badly damaged by a devastating earthquake and tsunami in 2011.

Fukushima is the name that everyone remembers from that disaster eight years ago. It was in this prefecture that waves from the tsunami overpowered a nuclear power plant’s protective sea walls, setting off a catastrophic meltdown. Tens of thousands of people were evacuated; many have still not returned.