Inoichi Yamanaka

is a Jonin from Konohagakure, and alongside Shikaku Nara and Choza Akimichi, he is a part of the first Ino-Shika-Cho trio, as well as the father of Ino Yamanaka. He is part of the Konoha Elite Interrogation Team.

Part I
Inoichi first appears in the anime alongside his former teammates, being derided for having a daughter instead of a son. He appears again during the invasion of Konoha, protecting the village with Shikaku and Choza.

Part II
When Ibiki Morino proves unable to learn anything about Pain from Yūdachi, he calls on Inoichi for assistance. He probes Yūdachi's mind, rapidly going through his memories before arriving at the revelation that Pain had requested of Yūdachi dead bodies. Before he can think on this Ino arrives to inform him of Pain's attack on Konoha and the village is soon afterwards destroyed. Shizune is killed in the chaos and, using the information Shizune had learned before her death, Inoichi realizes that Pain is animating dead bodies in a manner similar to his own clan's mental manipulation techniques, thereby meaning the true Pain is in a remote location somewhere relatively close.

While looking for Pain's real body, along with Shikaku and Kō Hyuga, they bump into Naruto. Inoichi asks if Naruto has defeated Pain, to which Naruto answers that it doesn't matter and states that he's found Pain's true body while in sage mode. He ask's them not to follow him as he wants to talk to Pain Inoichi states angrily that talking doesn't solve anything, after a brief argument, Shikaku tells Inoichi to just let Naruto go, to which Inochi hesitantly aggrees.

Abilities
Inoichi, presumably being the head of his clan, has shown himself to be a highly capable ninja. He is well-versed in all of his clan's secret techniques. During the invasion in Part I, Inoichi skilfully performed the Mind Body Disturbance Technique to make the invaders he encounter fight themselves without any control. Further proof of his skill is shown from his status as an interrogator during Pain's invasion of Konoha. He was able to skilfully probe a Yūdachi's mind even though Pain had guarded it with mental blocks and traps. He has also shown the ability to communicate telepathically with his daughter Ino.

He is also skilled at tracking targets through their chakra trail, so long as the target's chakra signature stays the same.