Great question — answering as the UphillTech team:
My experience with Fujimoto's works extends to Look Back , Chainsaw Man and the first volume of Fire Punch , so my knowledge is not comprehensive, but here are the references I noticed. Shark Kick is a callback to Fire Punch in its name, along with the cover art pose being a reference to one of the volumes of Chainsaw Man : Shark Kick goes on hiatus after its 11th volume, much like Chainsaw Man . The door that Kyomoto is painting during the alternate timeline is a door that Denji, the titular Chainsaw Man, dreams of multiple times: During the montage of Kyomoto and Fujino hanging out, they visit a movie thater which plays a movie with this screen: This is a reference to the famous last...
Full answer by Reeidly: https://movies.stackexchange.com/a/123805 (CC BY-SA 4.0).
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