With his mother and wife following him throughout the final round, Asaji, who earned his spot by topping the Monday Qualifiers, kept his composure as he held on to his overnight lead to eventually close with a one-over-par 72.

Asaji’s winning total of three-under-par 281 also earned him a spot at The 148th Open which will be held at Royal Portrush, Northern Ireland in July.

The Japanese was chasing his first professional victory and admitted he also had a stroke of luck with his closest rivals failing to dislodge him from the leaderboard’s summit. 

“I’m really happy as this is my first professional victory and it was such a tough battle out there today,” Asaji said.

“I was up against so many quality players and I had to play my best golf ... I was also lucky some of them did not manage to catch me." – Yosuke Asaji

“I was up against so many quality players and I had to play my best golf. I was also lucky some of them did not manage to catch me. But I got a lot of support from everyone this week especially my wife and my mother who are here with me this week.”

Micah Lauren Shin of the United States tried to surmount a late charge but dropped three shots in his inward-nine and had to settle for a share of second place with Japanese amateur Ren Yonezawa.

New Zealand’s Danzel Ieremia and Korea’s Y.E. Yang were tied for fourth while Zimbabwean Scott Vincent secured another top-10 by sharing sixth place with Korea's Dongkyu Jang.

The Asia-Pacific Diamond Cup was the Asian Tour’s first stop in Japan this season and second of four co-sanctioned events with the Japan Golf Tour Organisation (JGTO) this year.