Japanese Imperial Demon Army

The Japanese Imperial Demon Army (日本帝鬼軍,) is a military group with the task of dealing with supernatural tasks in Japan. It is lead by General Tenri Hīragi and comprised of many elite units. After the apocalypse, the JIDA comes into great power and establishes human cities in Shibuya and Shinjuku. They wage war against the vampires.

Their weapons include mass-produced Enchanted Gear, Cursed Gear, drugging up, spellcraft, and angels.

History
The JIDA was formed in response to the decline of human population and the threat of demons and vampires. Though there are also other magical organizations around the world, it is the JIDA that stands out as the most effective human organization that can survive and fend off vampires and demons.

Duty
After the outbreak of the Apocalypse Virus, the human population fell by 90%. It killed off anyone 13 or older, who did not receive the vaccine. Strange monsters referred to as the Four Horsemen of John appeared and began killing off the remaining humans. In response, vampires came into the open and saved as many humans as they could as human livestock out of concern for their drastically diminished food supply.

However, mankind would not give up so easily. Rebirth was coming. And to lead that rebirth would be the Japanese Imperial Demon Army. Their goal is to rally together all human survivors, and snatch back supremacy.

Child Policy
To increase their numbers, the JIDA encourage all soldiers and citizens to procreate and fight for hegemony. However, they have strict population regulations and may not allow humans from the outside world enter their gates. This contradictory attitude suggests that their goal in promoting procreation among their soldiers may actually be to give them something to fight for.

They also experiment on their human population; the entire school that appears in chapter 2 is actually an experiment with demon resistance, which either turns its subjects into feasible soldiers or else makes them go mad. It is not unusual for their test subjects to die or be killed by the testing circumstances.

Structure

 * Shibuya Main Army
 * Vampire Extermination Unit
 * Moon Demon Company
 * Infantry

Trivia

 * According to the vampires, the JIDA have been conducting experiments on the Seraph of the End.
 * Promotions in rank in the JIDA are often due to family status rather than success in battle or qualifications.
 * There are a lot of different factions in the JIDA (e.g. guards for the city Yūichirō is from, an Intelligence Force, teachers for leading classes on using Demon Weapons) and therefore a large range of roles one can be assigned to.