Inkadia

Inkadia is the name of the region in which Inkopolis is located. It is located in what used to be Japan, with areas based on landmarks such as Mount Nantai, the Miura Peninsula, Chiba Prefecture, and the Tokyo Yamanote Line.

Hammerhead Bridge (based on the Tokyo Bay Aqua-Line) connects Inkadia to the Splatlands, thus making it easier for residents of the two regions to travel back and forth. During Splatoon and Splatoon 2, the bridge was still under construction.

The distance between Inkopolis and Splatsville is about the same as the distance between Tokyo and Atami, being 87 kilometers, or 54 miles. Geographically, they are quite distant, but in the 5 years between and, Hammerhead Bridge and a train station have opened up and made the transit easier. According to Deep Cut, the train station was under construction for a long time. It would take a few hours to drive between them.

Trivia

 * "Inkadia" appears to be a portmanteau of "ink" and "Arcadia", a form of utopia characterized by harmony with nature in Greek mythology. This could explain the region's naming as "a haven".
 * According to Ask the Director Volume 7, the distance between Inkopolis Plaza and Square is about the same distance as Shibuya Station and Harajuku station, roughly 1.2 km (0.9 miles).