Inoichi Yamanaka

is a Jonin from Konohagakure, and, alongside Shikaku Nara and Chōza Akimichi, is a part of the first Ino-Shika-Cho trio, as well as the father of Ino Yamanaka. He runs his family's flower shop.

Chunin Exams arc
Inoichi first appeared in the anime alongside his former teammates, being derided for having a daughter instead of a son.

Invasion of Konoha arc
He appeared again during the invasion of Konoha, protecting the village with Shikaku Nara and Chōza Akimichi.

Invasion of Pain arc
When Ibiki Morino proved unable to learn anything about Pain from Yūdachi, he called on Inoichi for assistance. He probed Yūdachi's mind, rapidly going through his memories before arriving at the revelation that Pain had requested of Yūdachi: dead bodies. Before he could think further on this, Ino arrived to inform him of Pain's attack on Konoha, and the village was soon afterwards destroyed. Shizune was killed in the chaos and, using the information Shizune had learned before her death, Inoichi realized that Pain was animating dead bodies in a manner similar to his own clan's mental manipulation techniques, thereby meaning the true Pain was in a remote location somewhere relatively close by.

While looking for Pain's real body along with Shikaku and Kō Hyūga, they bumped into Naruto. Inoichi asked if Naruto had defeated Pain, to which Naruto answered that it didn't matter and stated that he had found Pain's true body while in Sage Mode. He asked them not to follow him, as he wanted to talk to Pain alone. Inoichi stated angrily that talking didn't solve anything, but, after a brief argument, Shikaku told Inoichi to just let Naruto go, to which Inochi hesitantly agreed.

Abilities
Inoichi, presumably being the head of the Yamanaka 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 encountered fight their own allies without any control. Further proof of his skill was 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, as long as the target's chakra signature stays the same.