Ouchi Prison is a super-prison built on Planet Kotori in YE 28 by the 5XF. In YE 29 the prison was used against the colonists by the Mishhuvurthyar. The prison returned to the Star Army of Yamatai control in YE 29 by the Fourth Fleet. One kilometer west of the prison is the Ouchi Memorial. The prison is located 1,100 miles from Genseirin.

The prison is built into the side of a large hill and with the exception of a few structures is completely subterranean.

Outside the entrance to the prison, the following features were added.

• A wall comprised of Ke-P5-01 - POM Standard Wall erected around the area creating a 300 x 300 meter controlled area.
• 2 Ke-P5-06 - POM Gun Towers overlooking the north and south walls.
• 4 Ke-P5-05 - POM Watchtowers at each corner

There is a Star Army Century stationed at a garrison just outside of the wall. They augment the security inside the prison, and oversee all prisoner transfers.

The prison is designed to hold up to 3,200 prisoners per block with (400 per floor). For a total capacity of 12,800. Additional expansion is possible.

100 meters under the hill is the top of the main prison structure. There is the central core and off it are the four prison complexes.

The core is a cylindrical constructed area that provides common features for the blocks.

Ouchi prison has four actually Blocks of cells which are accessed by 100 meter corridors that connect the B1-B2 levels of the block to the C1-C2 of the Core.

These cells feature a foam mattress on a raised area at the back of the cell that serves as a bed or bench. The floor and the raised area are coated with an extremely durable, fire-resistant plastic to protect the concrete floor and to prevent the prisoner from hurting themselves on the floor. The cells also include a plastic toilet, built into the floor, against either the left or the right side of the wall. The ceiling features a metal heating vent and a transparent Durandium Alloy window from which lights shine down; both are permanent (lights are replaced via a maintenance tunnel above the cell).

The actual cell door is made of transparent Durandium with a white stripe across that is labeled with the prisoner's identity and/or number. There is a small slot at the bottom of the door for food tray delivery.

High security prison cells are lined with Zesuaium and have two sets of airtight doors.

In YE 33 the prison facilities were upgraded with the following:

• Forcefield-Nested Isolation Doors positioned at all corridor junctions, and between levels.
• Star Army Fire Suppression System, Type 32 throughout
• Type 31 Lifeform Detection System in all interconnecting passages, and vertical passages.