Go around the war memorials and call everyone there fascists. Just do not shut up about how great China and North Korea are. Carry around the communist manifesto and stand on the street harassing everyone in broken Japanese about how great Karl Marx is, also buy an anime body pillow, as anime is the only good thing to come out of Japan. You would fit right in, everyone would love you. Also when on the train it’s customary to play your music over the speaker phone as well as eat gas station sushi with your mouth open. But please wear a mask!