An Operation Room (作戦室, Sakusen-shitsu?) is a private room used by Border Units B-Rank and above to plan and strategize for Rank Battles. They are located in Border Headquarters or in a Branch office.
The layout of an operation room differs from unit to unit, but they all have a standard rectangular size and shape. A-rank units' operation rooms are bigger than B-rank units' as they have a kitchenette and another small room about 4 tatami mats wide (about 6.5 meters square).
Some Operation Rooms have personalized features such as a kotatsu and refrigerator (Kageura Unit), gaming consoles (Tachikawa Unit), movie DVDs and giant artworks (Arafune Unit) and even a Mahjong board (Suwa Unit).
The Operation Rooms are designed by the unit members themselves.