Mark Dacascos does all his own stunts in the film.
Julie Condra and Mark Dacascos met and co-starred in this film, and then they married in real life.
Jason Scott Lee was originally wanted for the role but he had a three-picture obligation for Universal Pictures and could not commit to the project. Mark Dacascos lobbied for the part and eventually went on to became Christophe Gan's actor of choice for future and upcoming films.
Based on the manga Crying Freeman. There is also an anime based on the same manga, "Kuraingu furîman".