This is Arowana Mall. The deep, long stage structure will look familiar to players of the original Splatoon game, but the tenants of the mall have changed in the past couple of years. In addition, the mall has been renovated here and there. Arowana Mall is scheduled to re-open to the public in early February.
— Squid Research Lab
Source: Splatoon’s Tumblr.
…Wanna play? Buy a Switch.
And if you’ve already got yours, click on Splatoon 2 for everything you need to know about the game. 😀