Genryūsai Shigekuni Yamamoto was the captain of the 1st Division in the Gotei 13 and also the Captain-Commander of the whole Gotei 13. His lieutenant was Chōjirō Sasakibe. After being cast into Hell, he has achieved the epithet of “Founder of the Gotei”
Yamamoto is a fair-skinned man of average height. The oldest captain in the Gotei 13, he has aged into an elderly man with a bald head, visible cheek wrinkles, hooked nose, and pronounced cheekbones. He has red eyes, long eyebrows, long mustache, and a hip-length white beard secured by a purple band crossing down it. He has many scars on his body, with the two most prominent being a pair of long scars crossing above his right eye, one of which was left by his battle with his lieutenant. In addition to the standard Shinigami uniform, he wears a captain’s long-sleeved haori draped over his back instead of actually wearing it, with its size being greatly exaggerated. Despite his old and frail demeanor, often standing in a hunch, he in fact has a very muscular and well-defined built, which he only reveals serious for battle, something which Shunsui Kyōraku claims is not seen too often. After his brief confrontation with Sōsuke Aizen, Yamamoto lost his left arm.