From Game Developer Research Institute
Art System (有限会社アートシステム). Headed by Shogo Tanaka (田中昌吾).  Appears to have included a number of former Irem staff.
Research Methods: Actual mentions, online resources, shared credits
- Blaster Master / Blaster Master: Blasting Again (JP Publisher: Sunsoft; US Publisher: Crave Entertainment)
- Lagnacure (JP Publisher: Sony Music Entertainment)
- Lagnacure Legend (JP Publisher: Artdink)