It is a designated squad within Tokyo Metropolitan Police Department. Founded in 2013 and led by Shizue Kuranushi, ABIS is mostly made up of a team of Psyncers who have access to the Psync Machine, in order to dive into the subconscious dreams of a person of interest. Special Agent Kaname Date is a member of this team, and his AI-Ball assistant Aiba was created by the team's engineer, Pewter.
The members of this squad are as follows:
- Shizue "Boss" Kuranushi (2013-present)*
- Futa "Pewter" Amanoma (2013-present)*
- The term Advanced Brain Investigation Squad was a keyword featured in the announcement trailer for AI: THE SOMNIUM FILES, floating in the background at the beginning, referring to the police squad that the protagonist Kaname Date is a part of.