Saitō clan
In 1567, he fought in the Siege of Inabayama Castle against the Saitō clan. A few years later, with Toyotomi Hideyoshi spearheading the Oda clan's advance into the Chūgoku region, he pledged loyalty to the Oda. Yoshitaka, together with the sickly Takenaka Hanbei, served as Hideyoshi's strategists and assisted in the campaign against the Mōri clan.