I guess the biggest challenge is gonna be not to get stuck in those narrow alleys that they call streets in Japan. Some of them can hardly take a kei car, let alone a sedan
I can already see in my imagination all the jijis swearing when they see those cars stuck :)
The average motorcar still operating in japan is approximately 2/3rd the mass, and presumably volume, of the average personal vehicle in america. They also don't allow street parking on those "alleys".
Effectively they can be between 1/6th (2-lane) and 2/9th (1-lane) the width of a typical one-way american street and still have room for pedestrians along the side.
I can already see in my imagination all the jijis swearing when they see those cars stuck :)