Before coming down the ramp for her fight, Mei Yamaguchi, in a nod to her surroundings at Ryogoku Kokugikan, did a brief shiko (where a sumo wrestler lifts his leg high and straight before stamping it down on the ground).
Then, she made her way down the ramp as the strains of Black Sabbath's "Iron Man" blasted throughout sumo's hallowed hall. She'd go on to win with an armbar.
That's something you don't see during the New Year Basho.