In 1591, this area came under the control of Kikkawa Hiroie, a grandson of Mōri Motonari, who had conquered most of the San'in region from the Amago clan.
Kikkawa Hiroie rebuilt Yonago Castle as his residence and main stronghold as the areaway say to defense and controlled both land and maritime commerce in the region.
[3] Although the Kikkawa clan was nominally a cadet branch of the Mōri clan and subservient to Toyotomi Hideyori at the time of the 1600 Battle of Sekigahara, due to his strong antipathy towards Ishida Mitsunari, Kikkawa Hiroie had communications in secret with Tokugawa Ieyasu.
When the order came for his forces to attack Ieyasu from the flank, Kikkawa Hiroie reportedly "went to lunch", not returning for several hours until after the battle was decided.
The site is now maintained as a park, and is a 20 minute walk from JR West San'in Main Line Yonago Station.