Immigration is another possible solution, but Japan remains a relatively insular society and immigration is not favored by the population.
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I understand this slightly more clearly now… When I think about immigration and aging in Japan, Korea, and China, I think about the prospect of incentivising Filipinos to migrate to these countries by diplomatic means. I failed to see that in so doing, Japan and Korea open their gates to Chinese immigration, not dissimilar to what we have observed in the Philippines in the latter part of the last decade.