You don't have to make every mistake yourself in order to learn from it.

This. The Japanese people have made up their mind on the "migration for cheap labor" topic based on their experiences they saw in Europe.

Exactly - they choose not to commit that mistake.

It’s the rate of increase in immigration, which makes it harder for a country to “take it in and give room for assimilation”. Same problem in Canada, and a good chunk of pathways have been rolled back.

It’s not a simple issue, but very obviously citizens of countries where immigration rate has gone through the roof aren’t happy. Also the usual hatred starts when low income immigrants move into the country, as they’re more likely to work in public-facing jobs (markets, hotels, etc).

Agree, those in public facing roles are hated the most.