Abarenbou Kishi!! Matsutarou (Rowdy Sumo Wrestler Matsutaro)
The story follows Matsutarō Sakaguchi, 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. However, he is stronger than anyone and peerless in sumo wrestling. His greatest weakness is his own carefree personality. He grows into a full-fledged sumo westler.
[Source: Anime News Network]