Background
Mamichi Sugano was in 741. His father was Tsu no Yamamori.
真道 菅野
Mamichi Sugano was in 741. His father was Tsu no Yamamori.
In 778, Mamichi was appointed as an assistant draftsman and editor (少内記 shō-naiki) in the Ministry of the Center.
In 783, he was conferred the rank of gai (外) ju go-i no ge (従五位下). 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 ju go-i no ge (従五位下) and appointed the Crown Prince's tutor in the Confucian classics (東宮学士 tōgū-gakushi). 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.
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 a heated debate with Fujiwara no Otsugu (徳政論争 tokusei-ronsō), 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 shō shi-i no jō (正四位上). In 807, the kansatsu-shi (観察使) police force was established, and Mamichi placed in charge of the San'indō region. In 809, he was promoted to ju san-mi (従三位) 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 ju san-mi (従三位) and as governor of Hitachi Province.