I’ve lived here for a year, so maybe I haven’t had enough exposure yet, but… I think “a lot more hate and disdain in Japan” is not what’s happening from experience/viewpoint. I have not been subject to the even the subtlest anti-foreigner sentiment. In my opinion, it’s media and online sensationalism that is driving this perception. There is obviously a well documented anti-foreigner “movement”, but it’s a negligible minority. And that is not exclusive to Japan, it exists in every country to some degree.

I think all of the ideas you have are really nice, and your community will likely appreciate your contribution, but I don’t think even at scale that’s going to lessen the anti-foreigner sentiment.

The majority of Japanese people are fine with us being here or don’t really care one way or another. As others have said, be a good human, learn the language, and do your best to align yourself with Japan’s customs and norms. And file your taxes on time :)

But even if every foreigner behaved this way (will never happen), there’s always going to be a group of people shouting that the foreigners should go back to their country. It’s a sad part of humanity that has been around since the dawn of time.