Nuclear fusion power on earth poses extreme technical challenges.
One is the attainment of at least 100 million degrees C for long enough to produce net energy.
Another is that any power plant fuelled with Deuterium and Tritium must 'breed' enough Tritium to sustain itself.
Yet fusion power is futile because it cannot be deployed at a meaningful scale before 2050.
This is the target date for Zero Carbon - hopefully limiting Global Warming to less than 2 C.
So by this date all energy must be supplied from proven renewable sources such as Solar Photovoltaics, Wind Power, Hydro Power, sustainable Biomass and Solar and Deep Geothermal Heat.
The Fukushima disaster was aggravated by the personnel being responsible for multiple reactors under emergency conditions.
There had been no testing or drills of Station Blackouts and Loss of Cooling Accidents in the 40 years since the reactors were built.
Once reactor meltdowns and radioactive releases had occurred, they had no means of mapping the fallout to guide evacuation.
The later Abe government coerced ‘voluntary’ evacuees to return by stopping their housing subsidies after only six years. Many still resist returning, despite the hardships.
The Abe government also sought to restart the 39 remaining operable nuclear power plants, but succeeded with only a few. Nuclear power is still strongly resisted by most Japanese.