Hiroki Hara started practicing magic in 2001 by himself. He has now been featured by many TV shows. In 2005, he attended international magic contest on called SAM (Society of American Magicians) and won an award as the youngest magician ever. In March 2009, he attended World Magic Seminar Teens Contest hosted in Las Vegas U.S.A. He was entitled World Teen Champion. His performance got standing ovation and won grand prix for the first time for a Japanese magician.
After he won the grand prix, he was featured by a documentary movie. He performed at world-famous Magic Castle in Hollywood as the youngest Japanese magician ever.
He was invited to perform as closing act for Future's Stars Week. He performed at World Magic Seminar in Las Vegas as a guest in 2012. 
Hara's audition in Episode 1101 consisted of performing with doves and creating illusions such as changing color of clothing and turning into a dove while video projections mapped onto a screen in front of and behind him. Howie Mandel, Mel B, Heidi Klum, and Simon Cowell all voted "Yes," sending Hara to the Judge Cuts.
Hara's Judge Cuts performance in Episode 1107 consisted of first quickly changing his clothes after waving a sheet in front of his body. He then climbed into a small box with a hole for his hands to be chained by his assistants. As a rope keeping two sets of knives from digging into the box burned, Hara seemed to attempt to escape. After the ropes burned, however, the knives dug into the box, which was then revealed to be empty. Hara then popped up from seemingly nowhere at the judges' desk. Hara's performance was strong enough for the judges to send him to the Quarterfinals instead of Duo Guerrero and John Ferraro.
Hara's Week 1 Quarterfinals performance in Episode 1111 consisted of appearing to conjure up two real doves from projections of doves behind him. Hara moved in from to additional projections to act out his mother handing him a box, his mother transforming into a dragon, Hara holding an umbrella and walking in the woods, and Hara riding the dragon in the air. Finally, Hara "arrived" at a place called "Harawood", where his mother, now there in person, greeted him. Howie Mandel gave him a standing ovation. Hara finished in seventh or eighth place in America's Vote. In the Dunkin' Save, he received fewer online votes than Lori Mae Hernandez. In the Judges' Choice, although Heidi Klum and Simon Cowell did not vote for him, Howie Mandel and Mel B did, forcing a tiebreaker; whichever act had received more votes from America would progress. Hara received fewer votes than Deadly Games, eliminating him from the competition in Episode 1112.
After The Show
Hara appeared in a compilation of magicians at the beginning of the film Magic Camp released on Disney+ on August 14, 2020.