[1] He majored in design at a college in Los Angeles and later started out working at animation studio Madhouse.
[1] Prior to I Want to Eat Your Pancreas, he directed the opening of the anime series Sunday Without God (2013), participated as assistant director in the anime series One Punch Man (2015–, including the OVA One Punch Man: Road to Hero) and All Out!!
[2][better source needed] As a storyboard artist, he worked on individual episodes of anime series such as My Love Story!!
[3] He also said he took great care to emphasize the opposite personalities of the unnamed male protagonist and Sakura, the female protagonist, and to convey a development in these two main characters over the course of the film, with the aim of making the viewers feel attached to them and thus gripping the hearts of the audience.
[4] After I Want to Eat Your Pancreas, Ushijima did some more work for television anime as assistant director (Hunter × Hunter, 2018–2019) and episode storyboard artist (BNA: Brand New Animal, 2020; Fate/Grand Order - Absolute Demonic Front: Babylonia, 2020; Kiratto Pri Chan, 2020; Kaguya-sama: Love Is War, 2022), and he directed individual episodes for a number of other anime series, including Karakuri Circus (2019; another Studio VOLN production), To the Abandoned Sacred Beasts (2019), Norimono Man – Carl from Mobile Land (2020), Sing "Yesterday" for Me (2020), Wonder Egg Priority (2021), Akebi's Sailor Uniform (2022), Tokyo 24th Ward (2022) and My Dress-Up Darling (2022).