Itsumade

Its picture has the explanatory text, "as explained more fully in the Taiheiki, Hiroari shot the eerie bird that cries, 'itsumade itsumade'" (広有 いつまでいつまでと鳴し怪鳥を射し事 太平記に委し), so it depicts the odd bird that appears in the Taiheiki (circa 14c), volume 12, "Hiroari Shot the Eerie Bird" (広有射怪鳥事, "Hiroari Keteu wo Iru Koto").

The nobility thought back to how the master of arrows Minamoto no Yorimasa slew the nue and made a request to Oki Jirōzaemon Hiroari (ja:真弓広有) who splendidly shot down the eerie bird with a kabura-ya.

It is said that the eerie bird had a human-like face, a curved beak, saw-like teeth, a snake-like body, talons as sharp as swords, and a wingspan of about 1 jō and 6 shaku (about 4.8 meters).

The "Itsumade" name in the Konjaku Gazu Zoku Hyakki is considered to be a naming Sekien made upon illustrating this story in the Konjaku Gazu Zoku Hyakki on the basis of the bird's cry.

Yōkai-related literature starting in Shōwa began to also give the reading "Itsumadeten."