There's a proposed new immigration policy being floated (didn't see the article in Japanese) from the Justice Ministry where Japan would create a "point system" similar to that of Canada for immigrants. The idea is that anything that has value for living in Japan - education, work experience, language skills, Japanese dependants and so on - gives you points, and above a certain threshold you're deemed "valuable" and get preferential treatment for work visas, permanent residency and so on.
It's a good idea. The Canadian system seems to work fairly well. Of course, the Swedish version of it is even simpler: If you've got a job in Sweden, at the same wages and benefits as native Swedes, then you must be of value to the employer and thus to Sweden, so you get a two year work visa. Stay employed for long enough and you get permanent residency.
The good thing about it is that there's no arbitrary determination about who's "valuable" and who's not. If an employer wants to go to the extra effort and expense of bringing in somebody to Sweden at the same salary level as a native Swede then it's because that person really is valuable to them.
The system came about in part because under the old rules a restaurant could usually not hire an Indian chef or a Japanese sushi master because cooks were "manual labour", not specialists, and you were expected to hire Swedish workers for that. If you wanted to, say, open a high-grade sushi restaurant you had to staff it with a Swedish cook who may do smoked salmon and Hollandaise like a god, but likely has no clue about how to prepare sashimi.
Anyway, any opening up of immigration is good. People tend to really overestimate how attractive their country is to foreigners. Japan could probably throw their doors wide open and there'd still be no huge influx of immigrants . The doors have been open for many years to Brazilians of Japanese descent, and while a fair number have come here there was never a rush; the vast majority of potential immigrants obviously prefer to stay where they are.
The same would largely be true for Europe and the US as well. Most people who are determined to enter the US or the EU already do, one way or another. Opening the doors would not really increase those numbers significantly. And completely open immigration would have a counter-effect too: when you know you could move any time, you do so if or when it's convenient, not grasping the first chance you get. Immigrants would in other words be better prepared and better motivated. Whan you can re-enter at any time it's also easier for immigrants to leave if things aren't working out, rather than desperately hanging on.
I know it's a pipe dream, and free movement is never going to happen. It would be nice if it did, though.