吉田郡山城の所城主は誰？
The initial phase of the campaign began in June 1540, which involved an attack by the troops of Amago Hisayuki, his son Masahisa and his nephew Kunihisa on the domain of Motonari's ally, the Shishido clan, a foray that was to prove of little effect except to deny Haruhisa of some of his most capable generals and soldiers for the attack on Koriyama Castle. In August Amago Haruhisa had gathered a force of 30,000 and departed Izumo Province, moving into the vicinity of Motonari's Yoshida-Koriyama Castle and establishing a headquarters nearby.
Motonari