Its been six years since the meltdowns occured. There is now no radioactivity in the air. A little bit is seeping, via groundwater, into the ocean but that only affects the immediate Pacific off the Fukushima coast.

My wife and I won’t eat fish caught off that area of Japan, and even that is probably excessive. We’re just concerned that large fish that eat smaller fish, ie moving up the food chain, could possibly be contaminated. But elsewhere, other than parts of Fukushima Prefecture itself, at this stage everywhere else is perfectly safe.

Outside Japan, zero percent chance of any negative effects at this stage. The workers at the plant no longer wear anti radiation suits, just face masks, in case radioactive dust etc gets disturbed during construction work (inhaling such particles would be dangerous). My wife is from Fukushima and we visit occasionally. No problem.

As regards the state of the ocean off Fukushima, this is from an interview conducted last year:

ECU Professor of Environmental Radiochemistry, Pere Masqué. “Radiation levels across the ocean are likely to return to levels associated with background nuclear weapon testing over the next four to five years. As an example, in 2011 about half of fish samples in coastal waters off Fukushima contained unsafe levels of radioactive material, however by 2015 that number had dropped to less than one per cent above the limit. However, the seafloor and harbor near the Fukushima plant are still highly contaminated and monitoring of radioactivity levels and sea life in that area must continue.”