Mizuno, who won a youth event in Thailand the previous week, fired a fine 68 over the New Course at the Hong Kong Golf Club to establish a six-stroke margin of victory. Jeffrey Wang, Michael Regan Wong and Jonathan Yeap tied for second place with 74s, while Shinichi's younger brother Shinya placed fifth with a 75. Defending champion Charles Stone finished back in the pack after a lacklustre 84.
In the Ladies' division, Christy Chong edged out Emilie Vickie Leung on count back for the title after the pair recorded matching 32-point hauls. Cathy Chung earned third spot, a point further back.
The long-running tournament is the most popular event on the HKGA calendar, with over 320 players taking part.
For a full list of results visit www.hkga.com
Men's Gross Stroke Play Results
1 Shinichi Mizuno 68
2= Jeffrey Wang 74
Michael Regan Wong 74
Jonathan Yeap 74
5 Shinya Mizuno 75
6= Tom Scott 77
Daniel Wan 77
8= John O'Doherty 78
Justin Lok 78
10=Linus Lo 79
Chow Kar Fai 79
Sebastian Cheng 79
Ladies' Gross Stableford Results
1 Christy Chong 32*
2 Emily Vickie Leung 32
3 Cathy Chung 31
4 Rita Chan 30
5= Chan Ching Yee 28
Elsie Roberts 28
7 Estee Vivian Leung 27
8 Ruby Yim 26
9 Bonnie Yen 24
10 Lee Wing On 23
* Denotes win on count back