| Native Name: | 緋縅 勝五郎 |
| Hiodoshi Katsugorō | |
| Birth Name: | Moriwaki ? |
| Birth Date: | 1773 |
| Birth Place: | Yamagata District, Aki Province, Japan |
| Weight: | 116kg (256lb) |
| Heya: | Tamagaki |
| Record: | 149-49-92-13 draws/6 holds |
| Debut: | November, 1794 |
| Highestrank: | Ōzeki (November, 1814) |
| Retireddate: | February, 1823 |
| Eldername: | Akaō |
| Update: | October 2023 |
was a Japanese sumo wrestler from Yamagata District, Aki Province (now Kitahiroshima, Hiroshima Prefecture). His highest rank was ōzeki. He is the first wrestler from Hiroshima Prefecture to have been promoted to sumo's second highest rank, and the only one until the promotion of Akinoumi in 1941, 127 years later.[1]
All we know of Hiodoshi's true identity is his family name, Moriwaki. He began his career in the Osaka-based sumo association under the patronage of the Awa-Katsuyama Domain but joined the Edo-based association in 1794 and began his career directly in the sandanme division under the shikona, or ring name, .[2] In 1802 he reached the makuuchi division and acquired the patronage of the Morioka Domain. Known as a wrestler with great stamina, he nevertheless remained in the lower ranks of the division for a long time, suffering from his lack of technique and won few matches against top-ranked wrestlers. In 1813, however, he made his debut in the san'yaku status with a promotion to the rank of komusubi.
In 1814, he was promoted back to back to sekiwake and reached the rank of ōzeki, only retaining it for one tournament. However, Hiodoshi had to miss these tournaments and lost his san'yaku status, only regaining it at the end of his career in 1819 before definitively ending his wrestling career as a maegashira. At the time of his repromotion to san'yaku he changed his shikona to . He retired in January 1822, concluding a career of rare longevity (even by today's standards) of 28 years, including 21 in the top division.[2] After his retirement he became an elder and called himself, meaning 'red elder', and trained ōzeki Hiodoshi II, to whom he gave his former shikona and adopted him as his son.[2]