This blog consistently has argued for the U.S. needing more immigrants. This argument is strengthened by looking at the problems being experienced by Japan with practically no immigration, as recounted by Francisco Toro, a Venezuelan political commentator with Japanese relatives. 
“Japan’s population is shrinking, with far-reaching consequences that seep into every corner of life here. . . . As the country ages and older people die with no one to replace them, neighborhoods across Japan are also slowly dying.”
Just one sign of this is the existence of “abandoned houses like the one blighting my in-laws’ street. . . .Such houses have “fallen badly into disrepair. None of the heirs seems interested in [them]: The taxes are too high, and there isn’t really a market for this kind of house anyway.]”
“As many as 8 million houses in Japan are vacant, and the trend is only deepening. Rural villages are disappearing, and more and more Japanese towns and suburbs have become ‘dying communities’ where children are a rare sight; authorities barely manage to find the care workers needed to look after legions of retirees.”
“A solid [Japanese] political consensus has rejected mass immigration here for as long as anyone can remember, leaving this one of the most homogeneous countries on earth. You can think of Japan as a kind of Trumpian paradise: an ethnically defined national community with few foreigners. And no future.” (Emphasis added.)
Japan has a “demographic collapse that has left the country a pale shadow of the economic powerhouse that made Americans paranoid a generation ago. A chronic dearth of new workers has left economic growth lagging for a generation, turning “japanification” into economic shorthand for decline. All that — plus the ossified 1950s gender roles that simply never went away here — has turned Japan into one of the least attractive places for women to have children. Low birth rates only compound the demographic death spiral.”
“The [Japanese] government has begun making more work permits available to foreign workers, but makes little effort to help them integrate. Visa rules force most foreign workers to apply for extensions frequently and prevent them from bringing their families. By all accounts, discrimination in housing is rife, as well as perfectly legal. The foreign workers who do come can’t fail to hear the message: Come, work, but don’t think you’re welcome to stay.”
In short, “economic imperatives and cultural consensus are at war in Japan . . . . It’s no longer possible for the country to continue to pretend it can get by without migrants. But it’s politically impossible to truly welcome them, either. The result is that more and more jobs simply stay vacant, not just in industry and agriculture but also in the kinds of elder-care jobs this aging country most desperately needs to fill.”
For the U.S., Japan is “a bright red warning sign of demographic meltdown, and an indictment of a society that has chosen homogeneity over progress. . . . [H]omogeneity leads to decline, while diversity offers at least a chance of ongoing vitality and prosperity.”
Japan also may have a positive message for the U.S. After reviewing the many problems in U.S. “assisted-living” facilities, the author says, “Perhaps the United States can learn from Japan, which is a few decades ahead of us in grappling with how to care for its rapidly aging population. Japan created a national long-term-care insurance system that is mandatory. It is partly funded by the government but also by payroll taxes and additional insurance premiums charged to people age 40 and older. It is a family-based, community-based system, where the most popular services are heavily subsidized home help and adult day care. Japanese families still use nursing homes and assisted living facilities, but the emphasis is on supporting the elder population at home.” 
 See, for example, these 2019 posts to dwkcommentaries.com: Another Report About U.S. Need for More Immigrants (Aug. 25, 2019); More Warnings of the Problems Facing U.S. Aging, Declining Population (Aug. 14, 2019); Additional Support for U.S. Needing More Immigrants (May 18, 2019); Trump Erroneously Says U.S. Is “Full,” (April 9, 2019); U.S. Construction Industry Needs More Immigrants (April 3, 2019); Businesses Need More Immigrants (Mar. 24, 2019);“America’s Farms Need Immigrants” (Mar. 22, 2019).
 Toro, Japan is a Trumpian paradise of low immigration rates. It’s also a dying country, Wash. Post (Aug. 29, 2019).
 Anand, How Not to Grow Old in America, N.Y. Times (Aug. 29, 2019).