Lifespan: 10/3 of Eiroku 9 (1566) to 9/27 of Kanei 19 (1642)
Clan: Ryūzōji (Suko-Nabeshima family)
Lord: Ryūzōji Takafusa → Nabeshima Katsushige
Father: Ryūzōji Nobukane
Children: Nabeshima Shigechika
Ryūzōji Nobuaki served as a bushi during the Azuchi-Momoyama and early Edo periods. He was the second head of the Suko-Nabeshima family and served as a chief retainer of the Hizen-Saga domain.
In 1566, Nobuaki was born as the second son of Ryūzōji Nobukane, the first head of the Suko-Nabeshima family. His older brother died in the Bunroku Campaign on the Korean Peninsula so Nobuaki inherited the headship of the clan.
After the death of Ryūzōji Takafusa in 1607, Nobuaki supported the transition of the governing authority of Hizen from the Ryūzōji clan to Nabeshima Katsushige. He then served as a chief retainer of the Saga domain.
In the Keichō and Genna eras, on two occasions, Nobuaki transferred a portion of his landholdings to the administration of the Saga domain.
In 1626, Nobuaki retired and was succeeded by his son, Nabeshima Shigechika. Nobuaki died in 1642.