One piece, Tokyo?

*The Thousand sunny had somehow docked in a city that looked like the future? well whatever! the crew got off vut looked suspicious of everything, Untill they went inside a random warehouse (Because why not?) and saw many gangs- Tokyo manji, Brahman, Kanto manji gang and boten, which they all got together putting their fist into a fighting stance, which Mikey Manjiro had lunged his famous kicks at Luffy, which Luffy grinned and quickly used his rubber powers to send mikey flying, leaving shock.*