Inoichi Yamanaka

Inoichi Yamanaka is a Jonin from the Hidden Leaf village, and alongside Shikaku Nara and Choza Akimichi, he is a part of the first Ino-Shika-Cho trio.

Background
He is a member of the Yamanaka clan and owns the Yamanaka flower shop along with his daughter Ino Yamanaka. Inoichi is a member of the Ino-Shika-Chou trio, three Jonin of the Yamanaka clan, Akimichi clan and Nara Clan. His daughter Ino, is a member of her own Ino-Shika-Cho judging that their fathers were once teamates themselves in their early days as ninja.

Chunin Exams
He makes his first appearance, during the Chunin Exams mid festivals, sitting alongside his two teammembers, Shikaku Nara and Choza Akimichi. There he was berated by Shikaku, about "How Troublesome" it must be to have a daughter.

Later during the Orochimaru's invasion of Konoha, he along with the rest of the original Ino-Shika-Chou bravely and skillfully fought back the invaders with him demonstrating his impressive mastery of his clan's secret techniques.

Pain Invasion arc
Inoichi was part of Ibiki Morino's Investigation team and tried to read the mind of Pain's henchmen Yūdachi. Tonbo Tobitake, Shimon Hijiri and Mozuku assisted him, but the mind of the henchmen seems to be protected by some sort of powerful genjutsu. He manages to break through the genjutsu protection barrier and go straight into his mind, but he was interrupted when his daughter, Ino, tells him about Konoha being under attack by Pain. One of Pain's bodies then attacked the pair, but was confronted by Ibiki himself.

Abilities
Inoichi, presumeably being the head of his clan like his former teammates of their respective clans, 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 skillfully 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 a head interrogator in ANBU. His ability to probe minds is so great, he can break through even the most powerful of mental blocks. He has also shown able to communicate telepathically with people.

Trivia

 * He is the only member of the Previous Ino-Shika-Cho trio, whos wife has not been seen but is the owner of the flower shop Ino is seen working at.