Fukushima was the result of corruption,

Among others variables, the plant was designed to be constructed on a hill 30-35 meters above the ocean, but someones decided would be cheaper to construct it at sea level in order to reduce costs in water pumping, others decided to license this, and much latter, one decade before the disaster when was requested to reinforce the security measures within all the reactors in the country -in Fukushima for example to elevate critical systems to hills- others decided to ignore it [1][2]

[0] https://warp.da.ndl.go.jp/info:ndljp/pid/3856371/naiic.go.jp...

[1] https://warp.da.ndl.go.jp/info:ndljp/pid/3856371/naiic.go.jp...

[2]https://carnegieendowment.org/2012/03/06/why-fukushima-was-p...

What happens is that nuclear fusion is not here yet, and there is insufficient stable/maintained energy to meet current demand without using combined cycle power plants (combustion), and this without even a transition to full electric vehicles, with right now sounds to pure phantasy (how will be feed).

So the realistic by the moment sounds like to keep constructing new nuclear fission plants and renewables, keeping a diversification of sources, as is doing China with their mega projects. Without this will not be way to compete with their industry.

But more important, I think is needed to end the nepotism, the revolving doors (amakudari), and, of course, to prevent sociopaths from accessing positions of responsibility in any field... what sounds difficult because those positions are like magnets for them. This is what seems we don't learn from the human history.