It is hard or impossible to say conclusively what has been caused from the Fukushima accident. I recently posted a link to a 2017 documentary of nuclear waste in St Louis MO. You should watch it because as we know history repeats itself. I don't believe there has ever been a serious nuclear disaster that happened where the public was warned of it early enough to actually do anything to protect their health & safety.
LINK TO POST OF ST. LOUIS MO NUCLEAR LANDFILL WASTE:
https://www.netc.com/bb/viewtopic.php?f=22&t=2163