>Are there not a lot of toll roads in Japan as well?

There are, but at least wherever I've been driving or been a passenger, there are alternative roads which are just fine. In general slower, but every so often the toll roads are congested for miles due to a combination of roadwork and a LOT of traffic, which makes them slower than the alternative roads during those times.

As for cars - the Japanese aren't against cars. Many of my neighbors have two cars, particularly dual-income households. And they take very good care of them, as a rule. More than I would - to me a car is just a utility. Not for the Japanese. And people love driving too, at least outside the major cities.

Population density: Technically I live in a town with some 300,000 people. But it used to be nearly a dozen towns until 2006, when Japan decided to do some major restructuring and in many areas a bunch of smaller towns were thrown together to become a larger one. So we're really spread out..

Seoul is like this too. People look at the transit system and think it’s a model for car-less living. And while it’s fantastic, many Seoulites also love their cars. Those massive clusters of dense highrise apartment buildings you see everywhere? Most sit atop vast underground garage complexes.

> There are, but at least wherever I've been driving or been a passenger, there are alternative roads which are just fine.

And there are alternatives to the Interstate highway system in the US, but the since the Interstates have no tolls everything is build around them.