Jacobus's agent Grant Nieuwenhuys says the 19-year-old, who was promoted to Ajax's first team in August 2015, is hungry for game-time.
"Rather than sitting on the bench for a few PSL games, Justin hasn't featured at all," Nieuwenhuys tells snl24.com/kickoff.
"So it just makes sense for him to get some game-time elsewhere. We had a few options with other NFD clubs but he opted for Stars.
"Needless to that he is very upbeat about playing in the NFD. He doesn't see playing in the NDF as a step backwards. He is positive to showcase his talent and to add value to Stars."
Sasman, Nguye and Chideu are also expected to source game-time elsewhere.