Kamiya got started as an assistant director under Koichi Kawakita on the Heisei Godzilla films. He apparently jumped ship midway through the series to go work for Shinji Higuchi on the special effects for the Gamera trilogy of the 90s. Afterwards Kamiya ascended to the title of Special Effects Director on the 2000 film White Out. In recent years Kamiya has settled into a steady collaboration with director Shinsuke Sato, having provided VFX work on Gantz (2011), Library Wars (2013, 2015), I Am A Hero (2016), Death Note: Light up the New World (also 2016), Inuyashiki and Bleach (both 2017). Perhaps as a result of his time serving with Higuchi, Kamiya was one of the first of a new crop of visual effects directors to emphasize the use of CGI in mainstream Japanese science-fiction films, a departure from the traditional hand-made craftsmanship of kaiju eiga. Kamiya has directed two CGI films based on the Resident Evil video game series: Degeneration in 2008, and Damnation in 2012.