Inazuma Raigorō

was a Japanese sumo wrestler from Awazaki, Hitachi Province (now Inashiki, Ibaraki Prefecture). He was the sport's 7th yokozuna.

Early life and career Born , his birth date is ambiguous. Although the date of 1802 is commonly accepted, some say he was born between 1795 or 1798. If the former is correct, he was the youngest yokozuna until the promotion of Umegatani Tōtarō II in 1903. The details of his younger days are unclear. He entered the Sadogatake stable in 1821, under the shikona, or ring name. There, he began to wrestle for the Matsudaira clan, under which legendary sumo wrestler Raiden wrestled. Other sources state that he only started wrestling for the Matsudaira clan after he left his stable for the Nishikiyama stables. Upon promotion to komusubi in 1824, he changed his ring name to , meaning "lightning bolt" in Japanese. He reached the highest rank of ōzeki on ability alone, after only 6 tournaments (some ōzeki of the period were merely given the rank because of their size or status). Ōnomatsu is said to have been his rival and their competition established the golden age of sumo in the late Edo period.

Retirement from sumo After his retirement, he moved to Matsue but he returned to Tokyo in the Meiji period. He was known as a good calligrapher and a skilled writer, leaving behind him a lot of haiku.

The sumo precepts Inazuma is credited to have wrote the "Sumo Precepts" (sumo kun, 相撲訓), a combination of teachings related to sumo that warned rikishi against coarse behavior and taught them how to cultivate their fighting spirit. These precepts include notions like the cardinal values of Sumo (wisdom, humanity and courage) and disciplinary advices (wrestlers are not to indulge in the vices of alcohol and gambling). The "Sumo Precepts" also give advices to wrestlers when in bouts (do not show mercy to your opponent, do not underestimate him, do not fear him, do not scheme against him and follow your breathing while observing the moves). Championships for the best record in a tournament were not recognized or awarded before the 1909 summer tournament and the above unofficial championships are historically conferred. For more information see yūshō.