Rowdy Sumo Wrestler Matsutaro!! Season 1 Episode 9 How Wrestlers Relax ( Air Date 2014-06-01 ) Genre Animation category. Overview "Matsutarō Sakaguchi is a giant roughneck man with strength far beyond ordinary people. He never uttered words like "work hard," "strive," and "dream" like the typical shōnen manga protagonist, and he is stronger than anyone and peerless in sumo wrestling. His greatest weakness, however, is his own carefree personality.".