World No.22 Srikanth, who had reached the finals at Singapore Open in April, outclassed Sakai, ranked 47th, 21-11 21-19 in just 37 minutes to take home a cheque of USD 75,000.
"He was playing well, especially in the second game and I think for me coming back from 6-11 down and make it 13-13 was the turning point," said Srikanth, who had clinched the 2014 China Super Series Premier and 2015 India Super Series.
Srikanth played a patient game and didn't allow his opponent to engage in any fast-paced rally. He dictated the pace with his precise angled returns and unleashed his smashes at perfect intervals to down his rival.
Playing in tricky windy conditions, Srikanth took time to gauge the conditions as his initial returns went wide and out.
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After the interval, Srikanth continued to dominate the proceedings. His net dribbles were better than Sakai and with Sakai struggling with precision, the Indian zoomed to a 19-11 lead and sealed it with two lucky net chord points.
After the change of sides, Sakai was more aggressive in his approach and produced an improved net game to dominate the rallies.
Soon, the Japanese was leading 7-3 as he entered the break with an 11-6 lead with the help of a backhand return near the net.
The duo moved neck and neck after that till 19-19 before Srikanth produced two fantastic smashes to seal the issue and punch the air in celebration.