The 21-year-old DP World Tour Qualifying School graduate started the final round at Le Golf National four strokes off Englishman Jordan Smith’s lead, but burst into life on the back nine to capture Continental Europe’s oldest national open.
Hisatsune posted both a pair of birdies and bogeys on the front nine to make the turn at level par before a birdie at the tenth proved to be the catalyst for a brilliant title charge.
Four more birdies followed, including a simple six-foot conversion at the tough 17th hole, and he closed out a five under par round of 66 with a par at the last to reach 14 under par and secure a two-stroke victory.
Isao Aoki was Japan's first DP World Tour winner at the 1983 Panasonic European Open and it would be 33 years before there was another thanks to Hideki Matsuyama at the WGC-HSBC Champions, with Matsuyama since adding another World Golf Championships title and the Masters Tournament to his collection.
Hisatsune has written his name into the record books by becoming the third Japanese winner in DP World Tour history, as well as the fifth member of the Qualifying School’s Class of 2022 to win on the 2023 Race to Dubai.
The Japanese star’s victory moves him to 11th on the Race to Dubai Rankings in Partnership with Rolex and gives him the opportunity to fight for a PGA TOUR card for the 2024 season, on offer to the top ten members not already exempt at the end of the season.
Overnight leader Jordan Smith posted a one over par round of 72 to share second place with Denmark’s Jeff Winther on 12 under par, with Rasmus Højgaard finishing a shot further back in fourth place. Austria’s Lukas Nemecz rounded out the top five on ten under par.