Tokugawa Ienari
On the retirement of his father in 1830, Naomasa was appointed 10th "daimyō" of Saga at the age of 17. In celebration of his new role and to reinforce the close relations between Saga domain and the shogunate, his father-in-law Shōgun Tokugawa Ienari allowed him the use of one character from his name. Thus, "Narimasa" was written (斉正) until the end of the Edo period.