Inkopolis

Inkopolis is the city where the squid kids called Inklings live, that can be found in Splatoon 1 and Splatoon 2.
It's a city that contains every type of evolved fish, including Octolings.

In it you can find some shops, two museums, an arena, a weird dark company, an entrance to octo canyon and octo valley and much more.

Also turf wars are a really famous "sport" in Inkopolis

in Splatoon 3 thought inklings live in splatville.

B: Ngyes! wanna go to Inkopolis plaza?

A: for sure!