Talk:Earth/@comment-79.66.45.205-20190129001300/@comment-34984951-20190316005114

Not quite the case...

B-City (B市 B Shi) is a large city located in Japan. This city was briefly seen when the Brain and Brawn Brothers headed there in their quest to rule the world. Before being able to destroy the city, they were defeated by Saitama, but the latter's punch sent Marugori, the giant, falling on the city, demolishing it in his fall - https://onepunchman.fandom.com/wiki/B-City

There is more to a country or continent than cities. Telling from the background of B-city, there are islands, mountains, (or vast plains, even) that can be clearly seen.