"Ajin" was first seralised in the manga magazine "good! Afternoon" from 2012 and has released 9 volumes to date which has accumulated sales of more than 5.4 million copies. The anime movie version was screened in November 2015 while the TV anime series was shown from January 2016. The title "Ajin" refers to a group of people who look like ordinary humans but will not die even if they sustain life-threatening injuries.
In the movie version, Sato plays Nagai Kei who is a 26-year-old medical intern although the manga's setting is that Kei is a 17-year-old senior high school student. One day, he gets knocked down by a truck but is shocked to see his body recovering instantaneously on its own which makes him realise that he is an Ajin. As a result, Kei is kept under custody at the Ajin Research Institute where he is subjected to inhumane tests by the researchers. Just then, a Ajin terrorist Sato (Ayano Go) comes to rescue Kei but this is actually with the intention of getting Kei to join him in a mass massacre to take revenge against the non-Ajins. Kei then has to fight Sato and his accomplices even though he is the weakest Ajin who has yet to master how to control his power and IBM well.
Miyano who played Nagai in the anime version, said that "Ajin" had been a memorable piece of work for him. As such, he was very excited and happy about being able to participate in the real-life adaptation movie and be the voice of Nagai's IBM even though he was also surprised by the offer. Under the instructions of the movie's director, he had a lot of fun during the recording where he did several versions so he's looking forward to see which ones will be selected for the final version of the movie.