I knew Splatoon was a hit for Nintendo...but I didn't know it was popular enough to sell out concerts! Sure, the Japanese are conditioned to like CGI performers, but this is literally two people singing the songs in the game. That means the wiggly squid voice and all. The Squid Sisters, as they're called, are a trip to watch. See if you can make it through the whole video...I couldn't.
Thanks Polygon for the heads up!