As someone who moved to Japan it's always funny. I think people literally get their impression from Japan solely from neo-Tokyo sci-fi from the 80s. The country has taken some of the worst cues from the US.
Many cities like Tokyo are 75% suburban, single home, it's in fact the largest suburban region on the planet. The number of cars in the country is much higher than in the rest of Asia and many cities are extraordinarily sprawlish. From the air Tokyo literally just looks like a sort of denser LA (https://i.redd.it/mghcpc5xvt761.jpg)
If people are looking inspiration in Asia, Singapore is a much better place to look at, it deliberately designed around green spaces and avoidance of cars.