It's a true story that Nobunaga applied Hakudami (gold dust on a lacquered surface) on the skull of Yoshikage along with those of Hisamasa AZAI and Nagamasa AZAI and showed them to his vassals; however, the story that they used the skull as a glass and forced them to drink sake is fiction.
その後、浅井久政・浅井長政共々髑髏に箔濃（はくだみ）を施され、信長が家臣に披露したというのは事実であるが、杯にして酒を飲ませたというのは作り話である。