Unit Name: Jakuouki
Model Number: Unknown
Height: Unknown
Weight: Unknown
Pilot: Jabez Grims
Weapons: Phoenix Wave.

It was created many years ago in order to fight against the 100 evils of the world, along with the other Choukijin. Later, it was discovered by a British nobleman, Baron Jabez Grims, in China.

A mass amount of opium was injected into it, which allowed Grims to control it. After Grims succeeded in the excavation of Jakuouki and Buouki, it lead to the revival of Ryuouki and Koouki.

It's revealed during their battle with Ryukoou that in order to pilot a Choukijin, you need to be a powerful Psychodriver. It has the ability to fly since it's a bird type Choukijin. Since ancient times Jakuouki has fought with Ryukoou by Baral's orders.

Because of Ryuouki and Koouki's betrayl to Baral, they sent Shirei Ryuouki after Ryukoou in order to destroy it. Jakuouki and Buouki ended up joining with Ryuouki and Koouki, creating Shijin Shoukon Ryukoou, so that they could defeat Shirei Ryuouki.

This machine represents one of the four super mechanical gods, Suzaku.