As seen in the intro, in the flashback from Ryoba's school years, his bangs were long enough to cover his left eye, and he wore the default 1980's uniform. In 1980s Mode, Jokichi appears as a young man in his late teens (18).
As seen in the photo in the Aishi House, he has short bangs, and he wears a white, long-sleeved button-up shirt, tied with a black tie, and khaki pants with a brown belt. In 202X Mode, Jokichi appears as an adult man in his early fifties (51).
He has light skin, black hair, and black eyes. Jokichi looks like an adult version of default Senpai.