Ninth Division

The Ninth Division (九番隊, kyūbantai), also known as Squad 9 in the English dub, is one of the Gotei 13, headed by Captain Kensei Muguruma and Lieutenant Shūhei Hisagi.
The Ninth Division follows the traditional organization of a Gotei 13 Division. After the Defection of Kaname Tōsen the Division was run by the next highest authority in the 9th Division, Lieutenant Shūhei Hisagi. The Captain of the 9th Division is also the Editor-in-Chief of the Sereitei News Magazine. Some time after Aizen's defeat, Kensei Muguruma returned to his position as Captain of the 9th Division.
The mission of the Ninth Division is to protect the Seireitei. It is always on standby for combat because it is the security force of the Gotei 13. Traditionally, Ninth Division has overseen arts and culture. For this reason it is known to be in charge of the Seireitei news magazine. All the lieutenants of the divisions of Gotei 13 hand in their reports to them.
Like all the other barracks, the 9th Division Barracks house the offices and living quarters of the Shinigami of the 9th. The editing department of the Seireitei Communication magazine is also part of the 9th Division Barracks.


Info from :  http://bleach.wikia.com/