Root


 * Name: also known as ANBU: Root Division.
 * Affiliation: ANBU, Konohagakure
 * Leader: Formerly Danzo
 * Members: None. Formerly Sai and other unknown secret Ninja
 * Status: Disbanded, secretly active

is an ANBU training department that was founded by Danzo. Unlike normal ANBU, they carry a tipless Tanto instead of a Katana. This is an extremely strict group, since Danzo trained the members to lose their emotions. Each member has a codename and never reveal their true name. Sai's actual name is unknown thus being Codename: Sai. They are later on sent on secret missions the purpose of which is not revealed.

Infiltrating Orochimaru's Hideout

 * Assigned to: Sai

Secret Purpose: The apparent purpose of this mission was so that Danzo would be able to get information and ally with Orochimaru so they could destroy Konoha for revenge. However, it was later revealed that the real purpose was something else. After Team 7 looked into Sai's bingo book, they found several people who must be killed (or been killed), for being a threat against Konoha. Since Sasuke was one of them, Yamato deducted that the alliance was just a trick to get near Sasuke and kill him, which is later confirmed by Sai himself.

Conquer Konoha

 * Assigned to: None yet (Presumed all)

During Pain's invasion of Konoha, Danzo disappeared with his ninja to a secret place where they are planning to make Danzo Hokage. How they plan to do this is unknown.