They are fatalistic and welcome death if it means punishing their perceived enemies. The recent election results prove that. China needs to start making contingency plans to rapidly ramp up a possible military option that results in not just 1 million in Tokyo, but 50 to 100X as much. It's a stomach churning decision, but China can not shy away. It is existential.
Yes, fascism is always consensual. Unchecked mob democracy tends to lead to fascism. In the 1920-1930s, Japanese fascism became ever more extreme after the period of "Taisho Democracy".
The Japanese voter population have overwhelmingly supported Taikaichi. This is a recurring pattern. The last time a Japanese PM was this popular was Shinzo Abe. Abe pushed the red line by modifying the Japanese constitution. Takaichi is talking about erasing that red line. And the Japanese public have shown incredible approval for both PMs.
I am of the opinion that Takaichi and her fascist cohorts do have ambitions to remilitarize Japan and pursue nukes. Their nuclear ambition is particularly troubling. It is gonna be incredibly destabilizing. Judging by Japan's pattern of unrepentant fascism, they absolutely cannot be allowed to posses nuclear weapons.
I think China will be have to be very firm with Japan. If Japan really does go for nukes. China will make a formal complain and take serious economic and possible military actions. The US and Israel can bomb Iran to ostensibly prevent Iran from building nukes. So China has an even better justification.
An unrepentant Japan with nukes will inevitably threaten China with nuclear annihilation. Its not only an existential threat, but the historical baggage will make it exceptionally personal. Contrary to some opinions here, Japan already has, or is close to having the delivery vehicles for nukes in the foreseeable future. They are already buying Tomahawks and F-35s. Plus Japan is developing it's own offensive missiles while modifying their constitution to use them.
So if Japan somehow possesses it's own nukes, then its effectively a war. China would need to destroy Japan's nuclear weapons program before it could mass produce warheads. Some of China's nuclear arsenal would also need to be re-targeted specifically for Japan. This means that China would need to ramp up warhead production again, as it still needs to maintain a credible warhead stockpile for the US and India. I doubt that China itself desires this, but this will be 100% Japan's fault. The ball is fully in Japan's court. If they wanna go nuclear, then they cannot blame China for it's inevitable reaction.