Stand Alone Complex was produced with an 800 million yen investment, and Kamiyama decided to make the series as a "relative" to the manga and film, serving as a separate parallel world from both.

In 2007, after almost six years of working on the Stand Alone Complex world, he directed the TV series Guardian of the Sacred Spirit.

[3] Kamiyama and Shinji Aramaki directed Blade Runner: Black Lotus, an anime for Adult Swim and Crunchyroll, which was released in 2021 and 2022.

[4][5][6] On August 2, 2021, it was announced that Kamiyama would act as both director and writer of the feature-length anime work, Eien no 831 (transl.

Kamiyama described the film as an unprecendented opportunity despite the challenges that come from developing such project and being different from the thematic approaches he took on his other works.