Rikuya Hoshino started the day with a share of the lead and birdied his final two holes for a 68 to reach 14-under and win his first DP World Tour title by one shot at the Commercial Bank Qatar Masters.
He becomes the fourth Japanese player to win on Tour after Isao Aoki, Hideki Matsuyama and Ryo Hisatsune.
“I'm honoured to win at this wonderful tournament,” he said. “I was second at the last two Australian tournaments so I'm so happy to finally win.
“Of course I was nervous but I just tried to keep enjoying it.”
France's Ugo Coussaud who shared the overnight lead with Hoshino and Rasmus Højgaard closed with a 69 to finish second at 13-under.
Scotland's Scott Jamieson signed for a 65 featuring an eagle at the par-4 16th and finished third at 12-under.
Tom McKibbin of Northern Ireland carded a bogey-free 70 for fourth place at 11-under followed by Spain's Jorge Campillo (69) at 10-under.
Højgaard made just two birdies and three bogeys for a 73 and finished T6 at 9-under alongside England's Paul Waring (71) and France's Antoine Rozner (68).