- Titles: Iwanojô, Genba no kami
- Japanese: 永井 尚志 (Nagai Naoyuki)
Nagai Naoyuki was a Tokugawa shogunate official who played a notable role in coastal defense in the early 1850s.
Elevated from kachi-gashira to metsuke in 1853, Nagai was assigned to the guard stations at Edo Bay the following year. On 1854/1/22, he was named kaibô kakari (official in charge of coastal defense). On 4/5 that same year, he was re-assigned to Nagasaki; a year later, on 1855/4/10, Asano Ichigaku was assigned to take his place in Nagasaki.
Naoyuki continued to play a prominent role in foreign relations matters; in 1857, he was assigned to help oversee preparations for the visit of US consul general Townsend Harris to Edo. At the end of that year, on 1857/12/3, Naoyuki was named kanjô bugyô, replacing Mizuno Tadanori.
Naoyuki was named Gaikoku bugyô (Foreign Affairs Magistrate) in 1858, but was then reassigned to the new position of Gunkan bugyô (Warships Magistrate) the following year. Later that same year, he was dismissed from his position and sentenced to house confinement amidst the dismissal and house confinement of a number of prominent officials associated with foreign affairs.
- Ishin Shiryô Kôyô 維新史料綱要, vol 1 (1937), 493, 534, 537, 575, 580.
- Ishin Shiryô Kôyô 維新史料綱要, vol 2 (1937), 45.
- Ishin Shiryô Kôyô 維新史料綱要, vol 2 (1937), 386.
- Ishin Shiryô Kôyô 維新史料綱要, vol 2, University of Tokyo Shiryôhensanjo (1937), 454.
- Ishin Shiryô Kôyô 維新史料綱要, vol 3, University of Tokyo Shiryôhensanjo (1937), 142.
- Ishin Shiryô Kôyô 維新史料綱要, vol 3 (1937), 210.