An absurd counterfactual. This was assuming a scenario in which Fukushima released a ridiculously high level of radiation, which it didn't, that would necessitate other nuclear power plants to be immediately evacuated with nothing done to shut down their reactors resulting in a "chain reaction" of other plants releasing radiation presumably from the engineers just running away and letting a meltdown take place. Absolute FUD and bullshit since this would be an incredibly irresponsible thing to do and the Japanese people are far too competent and conscientious to enact such a hare brained evacuation.

Stop spreading disinformation please.

At the time of the Fukushima disaster no one could assess in real-time, and therefore according to the then-prime minister the worst case scenario was worked on. You can call it 'disinformation' (in other words: 'he is a liar'!) without any source all day, those are hard facts.