Four of Them

-Anime adaptation of the 40s manga by Osamu Tezuka, a boy accompanies his private investigator uncle from Japan to the future city of Metropolis, where robots are segregated and the de factor ruler is named Duke Red. Adventures in the Uncanny Valley ensue.

-I quite liked that Metropolis was not an all-encompassing world, but a relatively cut-off city that people from wherever can just visit now and then. And that people from Japan are marvelling at the robots.