Despite this Mondo was still able to rise through the ranks with perseverance and patience. When he first began riding he ended up at the back of the group which ended in him being caught by the police, causing a scuffle. Mondo constantly lived in Daiya's shadow. From then on both brothers were known as The Diamond Brothers, a well-known name across Japan.
Mondo was inspired by his older brother to take up biking and helped continue to transform The Crazy Diamonds into a well-known biker gang. He became dedicated to biking when he was young, being first allowed to ride with The Crazy Diamonds through his older brother Daiya Owada who invited him into the gang. 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. 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 owned a Maltese dog named Chuck who he loved deeply. Mondo grew up with his older brother, Daiya Owada.
