An early double bogey dealt a blow to Taiga Semikawa's ambitions of a breakthrough on the PGA Tour, leaving him with a shared 30th position.
Entering the final day just three shots behind the leader, the 23-year-old managed only a two-over-par 72 at the crucial moment, missing the chance to secure at least a top-10 finish at the Waialae Country Club in Honolulu.
Semikawa slipped 26 spots to share the 30th position with Hideki Matsuyama, the 2022 winner, and Ryo Hisatsune, with a total of nine-under 271.
Having conceded three shots over the opening four holes, Semikawa three-putted for a double bogey on the second hole before facing another setback on the fourth.
Despite attempting a comeback with birdies on nine and 11, he couldn't gain further ground and dropped his fourth shot of the day on the 17th.
Semikawa admitted regret for being too hasty with his decision on the green at the second hole.
Failing to save par from 10 feet, he subsequently missed a two-footer.
"I shouldn't have rushed," he lamented.
"I was really nervous. The pressure wasn't just because of my starting position, but the wind got stronger, making tee shots harder.
"Also, the pin positions today were really tough, so I had to carefully plan my putts. It's a shame I missed those shots.
Despite falling short, Semikawa chose to focus on the positive side, considering the result as an improvement from last year's T67 finish.
He expressed gratitude for the opportunity provided by the title sponsor, Sony Group, and pledged to deliver a better performance in the upcoming PGA Tour events - The American Express and Farmers Insurance Open - for which he secured entry via sponsors' exemption.
"While I hoped to finish in a higher position, I believe that compared to last year, I've shown growth, having played the entire JGTO season," he remarked.
With the chance to play in the next two weeks, he declared, "I still have the opportunity to make amends, and I aim to do just that."
Another JGTO member, Yuto Katsuragawa, concluded his campaign with a strong 67, finishing at T74, which is six spots higher than where he started.
Ends.