Like all the other barracks, the 1st Division Barracks house the offices and living quarters of the Shinigami of the 1st Division. In addition, due to the 1st Division being the division of the Captain-Commander, the barracks hosts the assembly hall where the captains gather for their meeting. The barracks also has a room set aside for lieutenants' meeting. Captain-Commander Yoshitsune's office within the barracks commands a wide, sweeping view of Seireitei.

Assembly Hall:
Spoiler:


A large open room which is used to host the Captain's Meetings when they are called. It includes one large throne, used to house the Captain Commander, and enough space for the other 12 Captains to line up in numerical order in two parallel lines.