You should be able to see for yourself that your argumentation is nonsense.
For Japan the accusation is that the Government by purpose produced this stockpile of Plutonium, also by creating a certain nuclear industry, to be in a position to create nuclear weapons, if they see it necessary. That's a political decision and the nuclear industry around nuclear powerplants is an enabler, created by the government via its energy and defense policies.
> It's not like a power plant reactor gives you the weapon technology magically.
They designed it.
Remember, you claimed that there is no connection. I reality, government set up nuclear industry such that it supports their weapon programs.
> All year? What happens when there is no wind and no sun?
You can find out. There is enough information about this topic.
A renewable energy landscape is more than just "wind & sun". An electricity grid is also more than a nuclear fleet in France, which for weeks&months had poor availability.
"In France, state-controlled EDF's nuclear output dropped by 30% in 2022, to 279 TWh, as more than half of its 56 reactors were taken offline for repairs which had been delayed due to the Covid-19 pandemic"