We have plenty of land, though! The similarly-sized Tokyo metropolitan area (5,419 square miles, 37.8 million people) has over six times the density of the 9-c

We have plenty of land, though! The similarly-sized Tokyo metropolitan area (5,419 square miles, 37.8 million people) has over six times the density of the 9-county Bay Area region (6,966 square miles, 7.68 million people).