I think Japan needs immigration to project and maintain its power in next 50 years. Otherwise, the problems like decreasing birth-rate, aging sociery, and inedequate funding to support the aging sector will take a toll eventually and bring down the country to a second class level. Well, there are more problems associated with this issue but I won't bore you with that. It's difficult for Japanese to swallow but they need to understand unless they go home and XXXX like rabbits, they will have to heavily rely on the immigrant population to sustain their economy down the line. I'm sure everyone knows that right?