Sorry, to clarify: I don't mean to dispute the article. But I think the article is focusing on a specific government trainee program that's been spun up to bring constructions workers for the Olympics.

I just think you were mistaken about the "every other [non-IT] career" part. There is plenty of immigration outside of the discussed trainee program and outside IT, so I just wanted to highlight that. Because otherwise it sounds like Japan has some kind of totally crazy locked down immigration system, but that is really not the case.