Sindhu, a Rio Olympics silver medallist, misplaced 7-21, 11-21 to world No. Three Okuhara in a lop-sided contest.
Sindhu had gained the final two occasions they performed one another and general loved a slight 7-6 benefit within the head-to-head report with Okuhara.
The duo had performed an epic last on the 2017 World Championships that had clocked 110 minutes and is taken into account top-of-the-line ladies's singles match within the historical past of badminton.
Since that marathon World Championships ultimate, Sindhu and Okuhara have performed one another six occasions and the Indian gained in 4 of these conferences.
However on Saturday, Sindhu seemed utterly out of types simply 15 minutes into the match and was crestfallen after meekly surrendering the primary recreation following a heap of unforced errors, primarily on the internet and sidelines.
Whereas the in-form Okuhara confirmed nice management, Sindhu appeared low on confidence and lacked the endurance to interact her rival in lengthy rallies.
After the change of sides, Sindhu lagged 1-Three however recovered to make it Four-Four. Okuhara then modified the tempo of the rallies and gathered six straight factors, which included two exact lifts on the backline and in addition a immediate internet return.
The Japanese reached 11-5 on the interval.
With Sindhu persevering with to commit easy errors, which included lacking the strains and discovering the web too typically, Okuhara dominated the proceedings, gathering factors at will.
Okuhara stored the strain on Sindhu and ultimately a round-the-head cross-court return took her to 18-Eight.
4 vast photographs delayed the inevitable earlier than Okuhara grabbed 9 match factors with one other excellent smash. With one other cross courtroom return, she sealed her place within the ultimate.
Okuhara will face world No. 1, Chinese language Taipei's Tai Tzu Ying, who fairly extremely saved 5 match factors to take the match towards Akane Yamaguchi to the decider after which got here up trumps.
She gained 15-21, 24-22, 21-19 in a 57-minute conflict with Yamaguchi to enter the finals.