Although Narimasa was often regarded as an adversary of Hideyoshi like Katsuie SHIBATA, since he disliked Hideyoshi and fought in the same Hokuriku area when Nobunaga was alive, a document of the Maeda family describes that he became so upset unlike a lord about the attack of the Toyama-jo Castle usurped by the Uesugi clan and had big quarrel with Katsuie for a period of time, so it seems difficult to say that he had good relationship with anti-Hideyoshi side.
大の秀吉嫌いで、信長存命時には同じ北陸方面で戦ったことから、秀吉の敵対者として柴田勝家とひとくくりにされることが多いが、一時期、上杉方に奪われた富山城の攻略では大将とは思えぬ取り乱しぶりで勝家と大喧嘩したという記録が前田家の文書に残っており、必ずしも反秀吉という面で親密な関係にあったとは言い難いようだ。