However, in a block-buster match that saw both women give it their all, Sindhu largely stepped up her game to take the third set 21-18 and with that, the winner's trophy as well.
The win, though, didn't come easy as Okuhara fought Sindhu right to the end, never giving away even an inch.
It's four-all! With her title win at the Korea Open Superseries, PV Sindhu levelled her head-to-head record against her latest nemesis.
Okuhara came back strongly after conceding a lead in the third set but found it hard when Sindhu stepped up her game in during the business end.More news: Trump takes advantage of the London attack to promote his travel ban
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Ironically, at Seoul's SK Handball Stadium on Sunday, Okuhara actually won more points than Sindhu - 59 points, to the Indian's tally of 54 - but ended up on the second step of the victory rostrum, while her rival towered over her on the top step. Sindhu's huge win comes as a revenge as weeks earlier she lost to Okuhara in the final of the World Championships which snatched her chance to win a first gold medal. Okuhara managed to save two game points as she equalized 20-all.
The Hyderabad young woman, who picked up her second Super Series title of the season and third overall, also denied Okuhara her third title on the trot. She was 11-6 at the break, which she extended to 19-9 after the interval, before slamming the door on the Japanese. Since then, the Korean player has climbed up to world ranking. Though the Japanese put up a great contest and fight, Sindhu always maintained a good amount lead throughout the final game which helped her immensely.
It will once again be her World Championship final nemesis and eighth seed Okuhara, who will stand in the way on Sunday. It was perhaps fitting that the match ended with another long rally, as Sindhu forced Okuhara to hit wide soon after. Sindhu went back to the basics as she targeted the Japanese with her powerplay as she led with 11-5 at the changeover.
Sindhu suddenly hit a bad patch as two wide shots and one of her returns were buried in the net, giving the Chinese a 20-16 advantage.