Japan has rail lines going everywhere which makes exclusive use of the subway system viable.
Secondly, city planning in Japan like most of Asia has mixed commercial and residential areas where everything you will ever need is within walking distance. If you need lunch, you just go down the elevator and walk to the nearest 7/11 or hole-in-the-wall restaurant. If you need a "load" for your phone, just go down to the phone repair store at the 1st floor of your building.
In the US, city planning intentionally separates commercial areas from residential / suburban areas to encourage the purchase of cars (helps the industry) and make us dependent on the use of fuel (easy to tax and generate revenue for the government). I cannot imagine going to a Costco or even a Safeway and bringing all those items through the bus-rail-bus system.
Yeah, I agree. I was just commenting on how the system/superstructure of the rail/train/subway system itself evolves in such heavily populated areas.
I dated a girl from Japan for a while and it amazed me that many people take close to 2 hours for commute each way! Car ownership was very low where she lived (near Shibuya). Yes, pretty much everything you needed was either available at the train station or very near by. That way, on your way home, you stop and get this, or that. We sort of had to plan everything out. Buy this one day, buy that another day. Limitation was what we (usually just me) could carry home.
Yes. Planning of communities in US is very much that way. However, there are very much more involved to encourage alternate modes of transportation. To make roads more bike friendly, allow better access to public transportation, etc. However, all that is dependent on change in lifestyle habits. When I lived in Seattle, we were offered free bus passes, which usually cost close to $150 per month. I ended up taking that and I thought I would be hampered by having to work around the bus schedule, but it wasn't too bad once you got into the flow of things. However, like mentioned above, it would be different if I had kids. Nowadays, I need my car to go from meeting here to meeting there. Back then, I didn't need my car much for work.