Japanese cities have extensive train networks making it easy, quick and cheap to get around. Most people living in Tokyo or other major Japanese cities don’t own cars. This makes the cities much more liveable and community oriented.
Japan also has some other differences from america that are required for this system to function
Yes; however America constructed those differences over the course of the 20th century when they removed rail lines and paved everything over with concrete. In the 1920s and 1930s America was exactly like this, with dense high-frequency train networks connecting even smaller towns, and walkable urban centers.