When the Honnoji Incident occurred while they were sightseeing in Sakai City (Osaka Prefecture), they tried to quickly return to Kai, but according to "Mikawa Monogatari" (Tales from Mikawa), as Nobukimi's party was carrying a lot of money and goods, they went a separate way for fear they might be robbed by Ieyasu's attendants; however, they were consequently attacked by natives who were holding up lost samurai along the Kizu-gawa River (near Yamashiro-Ohashi Bridge in the present-day Kyotanabe City, Kyoto Prefecture), and Nobukimi was killed.
堺市（大阪府）を遊覧していた際に本能寺の変が起こったため、急ぎ甲斐に戻ろうとしたが、『三河物語』によると、金品を多く持っていた信君一行は、家康従者に強奪されることを恐れて別行動をとった結果、山城国綴喜郡の現在の木津川(京都府)河畔（現在の京都府京田辺市の山城大橋近く）で落ち武者狩りの土民に襲撃されて殺害されたとされる。