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.

Part II
After the timeskip, Kotetsu and Izumo were the first to know of Naruto and Jiraiya's return, since they were watching over the gate.

Hidan and Kakuzu arc
After the news of a team consisting of 2 members of Akatsuki was infiltrating the Land of Fire reached the Fifth Hokage, Konohagakure decided to form the Niju Shotai to track them. Kotetsu, Izumo, Shikamaru and Asuma served as one of the 20 teams to track down the Akatsuki pair, Hidan and Kakuzu. They arrived to the Fire Temple to find it decimated and most of the monks dead. After noticing that the Head Monk's body,Chiriku's, was missing, Izumo noted that it had a high value in the black market, so the team went to the nearest exchange point to intercept Hidan and Kakuzu, engaging in fight with them. Despite stabbing Hidan in his vital organs, the team learned too late that both Akatsukis were immortal, and the team's leader and only Jonin, Asuma, was killed. They were shortly after assisted and saved by Raido Namiashi and Aoba Yamashiro, but the fight was interrupted by the Akatsuki Leader calling back, telepathically, Hidan and Kakuzu.

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.