Josuke Higashikata (東方 仗助, Higashikata Jōsuke; the Suke — 助 — in his name may also be pronounced as "Jo") is the protagonist of Diamond is Unbreakable and the fourth JoJo of the JoJo's Bizarre Adventure series.

Josuke is a high school first-year residing in the town of Morioh. He soon meets Jotaro Kujo, who informs him that he is Joseph Joestar's illegitimate son. After his grandfather dies, Josuke takes it upon himself to protect his beloved town from malevolent Stand users. Josuke wields Crazy Diamond, a powerful Stand with the power to repair almost anything.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.