Short answers, pulled from the story.
Studio Kajino is a subsidiary of Studio Ghibli, the Japanese animation company. It was created to handle live action film production for Ghibli, and is run by Ghibli's president Toshio Suzuki.
Studio Kajino was founded by Yoshiyuki Momose, an animator at Studio Ghibli. It was established prior to 2000 with the specific purpose of producing live action films for the studio.
Studio Kajino's first release was Shiki-Jitsu in 2000.
Studio Kajino co-produced Satorare in 2001 but received no on-screen credit. Its involvement is acknowledged only through an extra feature on the R3 DVD release, titled "Ghibli Studio."
Studio Kajino has produced music videos for the Japanese electronic act capsule, including "Portable Airport," "Space Station No.9," and "A Flying City Plan."
Studio Kajino specializes in live action films, distinguishing it from its parent company Studio Ghibli, which is known for animation. Its credited features include Shiki-Jitsu and the uncredited co-production Satorare.