Taking the idea further, it is notable that the entire population of California is smaller than that of Tokyo.
Tokyo is also unfathomable large, but the most astonishing thing is the amount of people. Tokyo has about 10 times the population of L.A. on an area of the same size. Of course there's traffic jams too, but not as bad as in L.A., because the metro system is a lot more efficient than the highways. During rush hour each train carrying thousands of people depart from each station every 2-3 minutes. You have to see it to believe it.