According to the Koreto Muhonki (a commentary on the Honnoji Incident) and the Renjoin Kiroku (journal written by priests of Kofuku-ji Temple Renjo-in), he wielded a sword himself to cut down enemy soldiers (this is rumored to be a myth, like that of Yoshiteru ASHIKAGA, yet it is open to debate as he was familiar with the art of swordsmanship as it was an essential discipline of that time).
また、その奮戦の具体的な内容だが、惟任謀反記や蓮成院記録によると自ら剣をふるい敵の兵を斬ったらしい（足利義輝の最期に似ているため創作ではないかとも思われるが信忠は実際に剣術を習っており、当時はたしなみの1つであったため、あながち嘘とも言えない）。