Mondo grew up with his older brother, Daiya Owada. He owned a Maltese dog named Chuck who he loved deeply. Chuck used to bring in the newspaper every morning when it was delivered to Mondo's home and would always beg Mondo for walks each day but died at the age of nine sometime during Mondo's childhood. He was raised by his brother to become strong and mentioned that his mother would kill him if he were ever to hit a woman.

He became dedicated to biking when he was young, being first allowed to