The situation in Japan for population is similar to that of the US. The boomer population is huge, and they had fewer children, so as they're dying out, there's

The situation in Japan for population is similar to that of the US. The boomer population is huge, and they had fewer children, so as they're dying out, there's less people. The difference between the US and Japan, is that immigration replaces the difference, keeping the overall population mostly the same. Japan is difficult to emigrate to, as you need a work visa, and though knowing Japanese isn't a hard requirement for work, in most industries you won't be able to get a job without it. Becoming fluent in Japanese, with daily structured education takes around 2 years.