Izumo Kamizuki

is a Chunin from Konohagakure. He spends most of the time with his partner Kotetsu Hagane watching who enters and leaves at Konohagakure's Main Gate. Many times, most of the time during the Filler arcs, they are easily fooled with Transformation Technique or ignored by people who run past the gate.

Chunin Exam arc
Before the Chunin Exam's first test, he was sent with Kotetsu to put a little test for the Genin before entering the classroom where the test was going to take place. His and Kotetsu's Genjutsu made the Genin see the second floor as the third, while they guarded the door of classroom 201 (the Chunin Exams were taking place in classroom 301) using Transformation Technique to appear as kids. The trap was easily discovered by Team 7 and many other Genin. Later on the third test, Kotetsu and he become proctors of the exam.

Sasuke Retrieval arc
During the Sasuke Retrieval arc, they are the ones who wake up both Sakura Haruno and then Tsunade. The latter sends them to get Shikamaru, who is given his first mission as a Chunin: to lead the Sasuke Retrieval Squad and bring Sasuke back.

Hidan and Kakuzu arc
Izumo and Kotetsu still are the Main Gate's patrolmen after the timeskip, and are the first to see Naruto and Jiraiya when they come back from training after 2 and a half years, and later they tell this to Sakura. The two appear again later as members of the Niju Shotai teamed with Asuma Sarutobi and Shikamaru Nara. Kotetsu, Izumo, Shikamaru and Asuma served as a team to track down one of the Akatsuki's pair, Hidan and Kakuzu, but resulted in failure along with the death of Asuma.

Abilities
During the battle with Akatsuki member Kakuzu, Izumo uses to blanket the ground in a sticky syrup that immobilizes Kakuzu, and Kotetsu attempts to attack the immobilized Akatsuki member. The attempt fails and the two are captured, but both are saved by the arrival of reinforcements. He can also work well with Kotetsu's Giant Kunai.