Chūjō Ietada served as a bushō during the Sengoku and Azuchi-Momoyama periods. As a retainer of the Oda clan, he served as the lord of Yagusa and Hiromi castles in Mikawa Province. He was commonly known as Chūjō Shōgen.
Ietada’s birthplace is uncertain. There are several theories including that he was (i) the eldest son and heir of Chūjō Hida-no-kami of Mutsu Province, (ii) from the Kasugai District of Owari Province, or (iii) from the Village of Yagusa in the Kamo District of Mikawa Province. His relationship to the Chūjō clan based in Kinu Castle is unclear, and to distinguish the two, he is referred to as a member of the Yagusa-Chūjō clan.
From an early time, Ietada served Oda Nobunaga. In the eighth month of 1552, Ietada fought valiantly against Oda Nobutomo, the lord of Kiyosu Castle and deputy military governor of the four lower districts of Owari, at the Battle of Kayazu. Together with Shibata Katsuie, he killed Sakai Jinsuke, a veteran in the rival branch of the Oda family. In the eighth month of 1569, he participated along with Chūjō Matabei in the Battle of Ōkawachi Castle. Prior to the Battle of Anegawa in the sixth month of 1570, he served together with Sassa Narimasa and Yanada Hiromasa as the rear guard in a retreat from Mount Hassō. During this battle against pursuers from the Azai army, Ietada and Matabe-e suffered injuries. Nevertheless, Ietada went on to engage in the Shiga Campaign in the ninth month of 1570, the Third Invasion of Nagashima against the Ikkō-ikki (followers of the Ishiyama-Hongan Temple) of Ise Province in 1574, and an attack against the Saika group of Kii Province in 1577.
In the third month of 1577, Ietada founded the Shōrin Temple associated with the Sōtō branch of Zen Buddhism. He also contributed to the reconstruction of the Sanage Shrine after it was ruined in the course of battles.
Ietada had two sons, Yajūrō-Hideyoshi (first son) and Sōsuke (second son) who, after the death of Oda Nobunaga, served under Oda Nobukatsu. Yajūrō-Hideyoshi died in the conflict on the Korean Peninsula known as the Bunroku-Keichō Campaign. After the fall of Hassō Castle, Sōsuke fled to Asuke.