Japan is protecting their country by keeping it Japanese. We would be well advised to take note. In 100 years Japan may not be a powerhouse but it'll still be Japan, in 100 years the U.S. will look like the movie Idiocracy with a population of spanish speaking imbeciles lorded over by Hindi speaking executives. We have 330 million people in the U.S., more than enough to satisfy our labor demands as well as home grown executive talent. Bringing in cheap labor from third world countries and H-1B talent because we don't want to pay going rates for home grown engineers will be the destruction of the U.S. as we know it. The Japanese know this, that's why they don't allow it.
More likely we will have some sort of Spanish machismo prevailing over our population. The woke nonbinary liberals are not going to reproduce themselves. Personally, I don't have a problem with our population becoming more Spanish. I like tacos. Besides we will all continue to speak English because that is the lingua franca in North America just like Latin back in the Roman Empire.