Hiroshi Nishikiori asked Hisaharu Iijima ~2022 or 2023 for a background for the Idolish 7 movie he directed at studio Orange. Iijima ended up drawing 2 (and a half?? or something) of the screen backgrounds
The last time they worked together was 2008 (Yotsunoha), I believe
The Ascent (1977) directed by Larisa Shepitko Лариса Шепітько
Before Elem Klimov, Shepitko's husband, made Come and See, Shiptiko made The Ascent. They're two different films, but I think you can find Sheptiko's influence in how Klimov later tells his own story of this kind
Storyboards for "Devilman: The Dark Spider Arc" (闇の蜘蛛編) that were never completed. Supposedly the idea was that the 1987 OVA series would be a trilogy, but only the "Birth" and "Sirene" were produced (please correct me if I'm wrong)
Umanosuke Iida 飯田馬之介