Earlier quoted context omitted.
that's very fascinating, as someone who has only experienced Tokyo, I was amazed with how clean it was compared to other Eastern Asian cities (I lived in Shanghai). Wouldn't have guessed it was a bit of smoke and mirrors.
Or the parent's comment is a big of exaggeration to downplay the general cleanliness. Compared to most major global cities it's night and day. I'd take a hard look on NY, Chicago, L.A, London, Paris, Amsterdam, before I complain like the grandparent about the Japanese situation which is an order of magnitude better... Tokyo of course is on a league of its own, but here's Osaka Street View, go around, how does it comp…
https://www.google.com/maps/@35.6960715,139.7029924,3a,75y,2...
We can compare that to a random spot in skid row, LA.
https://www.google.com/maps/@34.0413292,-118.2437281,3a,75y,...