In the Battle of Shido described in "The Tale of the Heike," while leading sixteen horse soldiers stood in front of 3,000 horse soldiers of the Awa Navy, Yoshimori cleverly tricked Noriyoshi TAGUCHI (an heir to Shigeyoshi TAGUCHI's, who later betrayed the Heike at Dannoura).
『平家物語』の志度合戦では、16騎で3000騎を率いる阿波水軍に向かい、平家の家人・田口教能（のちに壇ノ浦で平家を裏切る田口成良の嫡子）を言葉巧みに欺き降伏させた。