Hiroshi "Chocoball" Mukai is a Japanese porn star and professional wrestler. His nickname stems from the resembelance of his dark brown scrotum to Chocoball candy. He was born in Gunma Prefecture.

Mukai is best known in the West from Karl Taro Greenfeld's 1994 novel Speed Tribes as the thinly-veiled character "Choco Bon-Bon", depicted his struggle with methamphetamine addiction. Mukai has since kicked that habit, though, and in 1999 launched a successful side career as a pro wrestler.

The sex industry is still his main source of income: in 2004 he was arrested for performing a live sex show at a Tokyo "happening bar", or sex club. He admitted his guilt to police, reportedly saying "It's my job."

As a wrestler he has competed for FMW and, following its collapse, its derivatives. He once applied to join the New Japan Pro Wrestling dojo but was rejected.