>Japan overall is a very lonely society

Have you been to the local festivals where everyone knows everyone's names? Have you been to riverside bbq parties where multiple families hangout all day together? Have you been a part of company or community clubs? Have you observed how an overwhelming number of people have multiple-times-per-year gatherings with the university friends, middle-school friends and even kindergarten friends? For decades.

I have. And I feel not-the-least lonely, and I owe it to the above in Japan. Not the "decades-long-friendships" because I moved here as an adult. I can't compare it to anywhere else, because I haven't lived anywhere else for this long... but that's a sweeping generalization that about Japan.