Tsutsui Junkei

son of Tsutsui Junshō, and a daimyō of the province of Yamato. On 1571, Junkei, through the offices of Akechi Mitsuhide, pledged to service of Oda Nobunaga.

Military life Early in his career, in 1565, Matsunaga Hisahide, one of the most powerful warriors of the region, defeated Junkei and took Tsutsui Castle, but one year later in 1566, Junkei's Tsutsui castle was reclaimed after the battle against Hisahide, but shortly afterward he had to abandon it, following an order by Nobunaga.

In 1575, he joined the attack against the Echizen Ikkō-ikki, he participated in a unit among the forces from Yamato led by Harada Naomasa.

In 1577, by joining the forces of Oda Nobutada, along with Akechi Mitsuhide and Hosokawa Fujitaka, Junkei defeated Hisahide in Siege of Shigisan at Mount Shigi.

In 1578, He was then appointed to the position of daimyō over Yamato, and was allowed to build a new castle, which was called Kōriyama Castle, now in Yamatokōriyama, Nara.

He participated in the Siege of Itami (1579) against Araki Murashige and Tenshō Iga War in the Siege of Hijiyama in (1581) against forces of Iga Sōkoku Ikki.