Tokyo Metropolitan Police Department

Real life Tokyo MPD logo

*AINI SPOILER** Mizuki Kuranushi
* Marco

The **Tokyo Metropolitan Police Department** (**警視庁** *Keishichō*), or more commonly referred to as the **[Tokyo] MPD** and **Metro** for short, is the police force found in *AI: THE SOMNIUM FILES* and *AI: THE SOMNIUM FILES - nirvanA Initiative*, and featured in the Lemniscate YouTube series.

It's based off the real Tokyo MPD, which is the central Police Department that operates in the greater city of Tokyo, Japan. It has various branches all over the many districts, and it's home to numerous task forces. Its headquarters is located in Kasumigaseki, Chiyoda District.

In the universe of *AI*, they operate almost exactly the same, with the addition of the Advanced Brain Investigation Squad, a special task force led by Boss, which features the special agent Kaname Date, his assistant Aiba, and the engineer Pewter.

## Members

### Traffic Division

The Traffic Division makes up the foot officers who patrol around the streets, reporting any activity and calls that may have happened throughout the city.

#### Response Officers

The response officers in AI are a team of lead police offers who investigate crime scenes as the first response team, making sure that the scene has been contained and finding any evidence that may be helpful.

Several response officers were the ones who found Shoko Nadami's corpse after they received an anonymous call from Ota Matsushita.

### Criminal Investigation Division

The Criminal Investigation Division is one of the larger divisions within the Police Department. They investigate crimes that have occurred throughout the city, and catch the criminals for prosecution.

#### Forensic Units

The forensic officers are a special category of response officers. They are in charge of conducting forensic tests on the crime scenes, such as lifting fingerprints and footprints, as well as testing blood. It's expected of them to have at least a basic understanding of chemical science in order to conduct experiments.

So far, only one forensic officer is known:

* Araya Kagami (lead forensic investigator for the Shoko Nadami case/New Cyclops Serial Killings and Half Body Serial Killings)

#### Detective Unit

The detectives are a special category of police officer within the force. Detectives are the officers who investigate a general crime on a wider level than simply the crime scene, such as interviewing witnesses and capturing suspects. While response officers are in charge of gathering evidence of the crime, detectives are in charge of using said evidence and apply it to logical reasoning in order to solve crimes and mysteries.

So far, only two detectives are known within the force, and only one of them present by 2019:

* Akasaka (lead detective for the Shoko Nadami case)
* Hayato Yagyu (former detective)
* Mikoto Ushidera

### Crime Prevention Division

The Organized Crime Prevention Division (犯罪対策課, *Hanzai Taisaku-ka*) is another division within the Depatrment.

#### Advanced Brain Investigation Squad

*WARNING!!*
*This article contains spoilers for* AI: THE SOMNIUM FILES *from this point on. Proceed with caution!*

***WARNING!!***
***This article contains spoilers for*AI: THE SOMNIUM FILES - nirvanA Initiative *from this point on.Proceed with caution!***

The Advanced Brain Investigation Squad, or ABIS, is a special designated squad within the Tokyo Metropolitan Police Department, consisting of special detectives and officers. Unlike regular detectives, who investigate any regular crime that may occur, ABIS investigates crimes of unnatural or psychological nature, thanks to their special equipment known as the Psync Machine, which allows a user to dive into the subconscious dreams of a sleeping subject, and gather mental testimony and evidence as such.

In 2019, there are at least 9 members included within ABIS, consisting of a squad captain, an engineer, 6 different "special agents" —also referred to as Psyncers—, and an A.I. assistant to at least one of these Psyncers. The status of various members changes depending on the timeline, such as the squad leader, Boss, dying in two separate timelines, and the engineer, Pewter, being arrested in the main timeline.

By early 2026, two new Psyncers are added to the team:

* Shizue "Boss" Kuranushi – Squad Leader (2013-2019/ongoing)
* Futa "Pewter" Amamona – Main Engineer and Scientist (2013-2019/ongoing)
* Kaname Date - Special Agent and Psyncer (2014-ongoing)
* Aiba – AI Assistant Agent (2014-ongoing)
* Mizuki Date – Special Agent and Psyncer (2026- )
	+ Temporary Psyncer (2019)
* Kuruto Ryuki - Special Agent and Psyncer (2020 or earlier- )
* Tama - AI Assistant Agent (2020 or earlier- )
* Mizuki Kuranushi - Secret Agent and Psyncer (2020 or earlier- )
* Marco - AI Assistant Agent (2020 - )
* 4-5 unknown special agents in 2019

## Navigation

Hitomi Sagan • Mayumi Matsushita • Renju Okiura • Mama • Shoko Nadami • So Sejima • Moma Kumakura • Rohan Kumakura • Cyclops Serial Killer

 Locations | **Tokyo**
*Chiyoda District*: Police Headquarters (Boss's Office, Psync Room, Interrogation Room) • Sunfish Pocket • Sekiba High
*Chuo District*: Horadori Institute of Genetics (Underground, Hostage Room) • Naixatloz Japan Branch (President's Office, Cathedral)
*Koto District*: Harbor Warehouse District • Date Residence
*Minato District*: Studio Dvaita • Aioen Orphanage • Ikume Shrine • Kumakura Office • Sejima Residence • Central Hospital
*Shibuya District*: Lemniscate Entertainment Offices • Yoyagi Park
*Shinagawa/Kabasaki District*: Matsushita Diner • Sagan Residence • Enda Residence • Kabasaki Chemical Plant
*Shinjuku District*: Golden Yokocho (Marble, Brahman World Cuisine) • Misetan Department Store • Tokyo National Stadium
**Side Ryuki:**
Dispossessed • Anyone Imagines • Ought to Know • Nothing to Be Done • Go • Farewell
**Komeji and Shoma Route:** Joy for Anguish • I Found Me • Past Its Ken
**Explosion Route:** Smiles for Tears • Well-Known • The Mind of God • Not All A Dream • She Was the Universe
**閭｡陜ｶ荵句､｢邱ｨ Route:** 遐ｴ邯ｻ逋ｾ蜃ｺ • All This Happened, More or Less
**Side Mizuki:**
Alone • Pass Mildly Away • End Where I Begun • Traveler • Left Behind • The Expense of Spirit
**Gen and Amame Route:** All Living Things • Of Arms and Of Man • Who's There • All That We Are
**Kizuna and Lien Route:** Bid the Soldiers Shoot • Sweet Silent Thought
**Resolution Route:** Hell • Visions • In Truth • Births • The End of Craving • Braver Than All Flowers