Nobunari was the son of Matsudaira Hirotada and was adopted by Naitô Kiyonaga. He served Tokugawa Ieyasu first as a page and fought in the 1565 Mikawa monto riot and distinguished himself at the fight for Koromo castle. He later saw action at Mikatagahara (1573) and Nagashino (1575). He was given the castle of Nirayama in Izu (10,000 koku) in 1590, before being transferred to territory in Suruga province taken from the Nakamura clan in 1601, and ended his career with a 50,000 koku fief at Nagahama in Ômi province.
- Initial text from Samurai-Archives.com FWSeal & CEWest, 2005
- Cesare Polenghi, Samurai of Ayutthaya: Yamada Nagamasa, Japanese warrior and merchant in early seventeenth-century Siam. Bangkok: White Lotus Press (2009), 13.