Armed Detective Agency

The Armed Detective Agency (武装探偵社,) is a group focused on solving crimes which are considered too violent or difficult for the Military Police to handle. Often, these crimes are of a supernatural origin. Nearly all of the detectives within the company have their own special powers known as Abilities.

The Agency has an entrance exam for new employees, to assess if they possess qualities that make them worthy to join the Agency. The test usually consists of their qualities as a detective and their emotions of whether they are willing to risk their lives to save people.

Admission
In order to join the agency, the candidate must take a test that evaluates their righteousness, prowess, wisdom, morality and genuiness of spirit. The examiner sets up a situation that the candidate needs to solve. If the testee passes the exam, only then will they become an official member.

As the current Director of the Agency is Fukuzawa Yukichi, all people that are official members are affected by his Ability: All Men Are Equal.

Osamu Dazai's Entrance Exam (light novel)
After two years of laying low following his defection from the Port Mafia, Dazai was introduced and recommended for employment to Fukuzawa by Chief Taneda, Head of the Ministry of Internal Affairs, Special Ability Department. Fukuzawa put Kunikida in charge of Dazai and his Entrance Exam. Kunikida decided that solving the Serial Disappearance of Yokohama's Visitors case would be Dazai's Entrance Exam.

Atsushi Nakajima's Entrance Exam
Shortly after meeting Dazai and his partner Kunikida, Atsushi is manipulated into joining the Agency against his wishes. Atsushi unknowingly undergoes the entrance exam, and passes it.