Miyoshi clan
The castle was originally constructed in 1536 by Kizawa Nagamasa, who commanded it on behalf of the Hatakeyama clan, who held the post of "shugo" of Yamato province. It was repaired and expanded on in 1559, by Matsunaga Danjo Hisahide, who commanded it on behalf of the Miyoshi clan. It would grow to be roughly 700m from north to south, and 550m from east to west, and included a four-story "yagura" (tower or turret). In 1562, however, the daimyo of Yamato province moved to Tamonyama Castle.