| Sugano no Mamichi 菅野真道 | |
| Birth Date: | 741 |
| Death Date: | July 23, 814 |
, originally known as, was a Japanese noble of the early Heian period. He reached the court rank of and the position of sangi.
In 778, Mamichi was appointed as an in the Ministry of the Center. In 783, he was conferred the rank of . In this period, he also held various posts in the imperial guard and as a regional administrator. In 785, with the investiture of Prince Ate, the future Emperor Heizei, as Crown Prince, Mamichi was promoted to and appointed . In 790 Mamichi appealed to have his family's rank increased from muraji to ason, and was granted the new family name of Sugano no Ason, based on his place of residence.[1]
Thanks to the confidence of Emperor Kanmu, Mamichi was able to hold increasingly important positions in the imperial guard and the daijō-kan. He was also deeply involved as an assistant director in the construction of the new capital at Heian-kyō. During the same period, his court rank steadily rose, to in 789, in 791, in 794, and in 797.
Along with Fujiwara no Tsuginawa and Akishino no Yasuhito, Mamichi worked on the compilation and editing of the Shoku Nihongi, completing its 40 volumes in 797. In 805, he joined the ranks of the kugyō with a promotion to sangi. Later that year, he held, in which Otsugu argued that the planned campaign against the Emishi in the north and construction of the capital were overburdening the populace and should be stopped. Mamichi was strongly opposed to this, but the Emperor was convinced by Otsugu's argument, and the plans were halted.
With the ascension of Emperor Heizei in 806, Mamichi was promoted to . In 807, the police force was established, and Mamichi placed in charge of the San'indō region. In 809, he was promoted to and placed in charge of Tōkaidō. In 811, during the reign of Emperor Saga, Mamichi reached the age of 70 and retired from his post as sangi. He died on July 23, 814 at the age of 74, with the rank of and as governor of Hitachi Province.
According to the Shinsen Shōjiroku, Mamichi was descended from the 14th king of Baekje, Geungusu of Baekje.