Koji in Naruto

There is much uncertainty about Koji's past as we still don't know anything about his clan, and his history. In the manga or its anime adaptation, he only made a few brief appearances.

He first debuted in Live or Die: Risk it All to Win it All!, episode 56 in the Chunin Exams Arc in the series. In the arc, he was introduced as a classmate of Konohamaru Sarutobi, the Third Hokage's grandchild, and a ninja academy student. When he said that he would one day become Hokage, Iruka Umino, their sensei, said that he would first need to improve his grades before he could become the Hokage.

Koji later appeared in the Follow My Lead! The Great Survival Challenge Arc. In the anime, Koji takes part in a survival exercise led by Neji Hyuga. Koji and her team members, Futaba and Jin, were in awe of Neji's skill at using a watch as a compass to navigate in case a compass does not work.

In the Konoha Plans Recapture Mission, Koji and other academy students were thrown out of their classes under the threat of a live bomb located somewhere in the academy. Koji, Nobori, Daichi, and some other kids went to an area to throw kunai knives at a wooden block.

Soon after they started throwing their kunai, Naruto Uzumaki, Rock Lee, and Choji Akimichi came to the scene to stop them under the suspicion that the bomb was planted in the wooden block, which turned out to be true.

Koji hasn't shown up since these appearances, and her absence makes it impossible to ascertain whether he's dead or alive. Koji is currently assumed to be alive and well unless any information surfaces indicating otherwise.

Koji never had the chance to interact much in the series and did not have any significant role in the series. He never had an opportunity to showcase his personality. However, it is stated that he has a very outgoing nature.

Koji is a young boy with small dark eyes and short, dull-purplish spiky hair. He wears a grey off-white shirt and a green tie paired with a matching pair of medium-sized brown cargo shorts and sandals.

Koji is a former Hidden Leaf Ninja Academy student. However, he only made a very brief appearance in the series and was never shown employing any jutsu or skills. The extent of his arsenal of skills is unknown due to a lack of evidence.