The 26-year-old Sindhu had made it to the last four in Indonesia Masters last week and also at the French Open in October.
Third seed Sindhu, the reigning world champion, had to toil hard to get the better of Yujin 14-21 21-19 21-14 in the quarterfinal that lasted an hour and six minutes.
After a slow start, Sindhu, the reigning world champion, engineered a turnaround to register a hard-fought 17-21 21-17 21-17 win over Japan's Ohori in one hour 10 minutes to advance to the pre-qfs.
The men's doubles pair of MR Arjun and Dhruv Kapila also suffered a loss and as a result, the duo bowed out of the tournament.
Just days after their semifinal finishes at Indonesia Masters Super 750, the two top Indian shuttlers will begin their campaign at the World Tour Super 1000 event in their quest for title.