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

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.