Japan’s social recluse: “cabinet office surveyed 30,000 people between the ages of 10 and 69 across Japan last November. The poll found that just over a fifth of respondents aged 15-39 had been socially isolated from six months to less than a year”

Link. COVID exacerbated Japan’s longstanding hikikomori problem, but elsewhere the article states hikikomori are only 2% of age 15-62. So this is hard to interpret.