Have you ever been to Japan? I know someone who was in Japan just recently and they saw barely 10 blacks the whole time. There are more young Japanese living in Japan right now than probably did 50 years ago. They will be fine as long as they don't commit suicide like Europe.
There are more white people on the planet now than ever before in the history. The problem is that there are even more non-whites and white countries are being intentionally sabotaged by flooding them with non-whites. It is a scam to bring about the genocide of the white race.
Japanese birth rates are lowering/leveling off which is not an uncommon phenomenon in first world countries where the standard of living and access to education is high and there is greater gender equality. The rules in Japan on immigration and foreign workers is much stricter than in the United States. Recently, in relation to the past, there has been more importation of foreign labor in Japan, mostly Koreans, Chinese, Indians and South East Asians. Even some Nigerians... There is also a long established Indian population in Japan as well.
I have a lot of respect for the Japanese and their culture and hope they continue to keep tight control on immigration so that they retain their unique identity.