That said, I think people need to recognize that in many aspects what's happening is connected to societal issues that gun control and gun regulations will have very little impact on - remember, even in Japan somebody could make some kind of battery ignited home-made shotgun and kill Shinzo Abe.
ok let's try data instead of feels. Per Capita, what is the number of mass shootings per year in the USA, and in Japan. I did't know the answer but asked Gemini.
The most recent year for which there is data, apparently, is 2023, during which there were 604 mass shootings in the USA, and 1 in Japan. Given the respective population counts, the per-capita rate of mass shootings in the United States was about 225 times higher than in Japan.
Given that, are you confident that your observation that "one guy made a gun once in Japan" is a strong refutation of the idea that the US could reduce mass shootings by strengthening regulations?
Now, how about your evidence?
https://rockinst.org/blog/public-mass-shootings-around-the-w...
The US is an outlier in how many guns we own, with about 1/3 of American adults owning guns, and we are also an extreme outlier in mass shootings unless you compare us to places that lack rule of law. How many more people need guns before that mass shooting number goes down to 0, do you think?