|Genryusai Shigekuni Yamamoto|
|Affiliation||Gotei 13, Soul Society|
|Position||Captain-Commander of the Gotei 13|
Captain of the 1st Division
|Base of Operations||1st Division HQ, Soul Society|
|Bankai||Zanka no Tachi|
Yamamoto has the appearance of an old man with red eyes, a very long white beard, and long eyebrows. There are many scars on his torso and head, the two most prominent being a pair of long, perpendicular scars above his right eye, left by a battle with his lieutenant. He wears the standard Shinigami uniform, but its size is greatly exaggerated. He also drapes his haori over his back instead of actually wearing it. Despite his old and frail appearance, he has a very muscular body that he only reveals when he goes to battle.
The embodiment of conviction, Yamamoto follows the laws and regulations of Soul Society to the letter, and expects the same of others. He is not a man to tolerate insubordination, and is vocal with those who attempt to act in such a manner. He is quick to anger in the face of possible betrayal, and can be quite aggressive in combat. He has a habit of referring to those he faces in battle as "youngster" and he also refers to a battle as a "beating" or "punishment". When in a state of peace, he carries himself with an air of frailty. Due to years of experience, Yamamoto very rarely shows any sign of distress or surprise, usually responding by opening one or both of his eyes, which are partially closed slits for the majority of the time.
Yamamoto is very loyal to Soul Society and takes his duties very seriously, expecting the same from the rest of the Gotei 13. His loyalty is so great that he is willing to sacrifice himself and the Gotei 13 in order to defeat a dangerous enemy, believing it to be their duty to lay down their lives for the sake of the Soul Society if necessary. Despite this, he will reluctantly bend the rules somewhat or make exceptions in certain situations when he knows that doing so is the smart decision.
- He shares the same last name as Julie Yamamoto.