If you look closer you will see the Tokyo population is shrinking from its 2015 number.
What blows me away is both Tokyo and Greater Delhi (New Delhi) are both larger in population than all of California which practically feels like wall to wall people. They must be stacked on top of each other very high up. I just can't imagine living like that after living in a rural setting for so long now. It would drive me to jump off one of those skyscrapers I think with all the noise, smells, and close proximity of so many human bodies.
“What blows me away is both Tokyo and Greater Delhi (New Delhi) are both larger in population than all of California which practically feels like wall to wall people.”
California has 39.54 million people as of 2017. So you may draw the comparison that those cities have roughly the same population, but not more than California. I should add that once you get a little north of LA or east of San Diego there’s nothing but open space aside from the Bay Area.