The German (left), who upset top seed Wang Shixian in the quarter-finals, ended the run of Chinese qualifier Chen Xiao Jia in straight games, taking 42 minutes to score a 21-16, 21-13 victory.
She now faces a third Chinese player in newly crowned Asian champion Li Xuerui, who didn’t have to lift a racquet after compatriot Jiang Yanjiao conceded a walkover.
The world No. 8 spoke to the media after her win and said: “I have beaten two Chinese in two rounds, they are great wins.
“The Chinese players always have special skills, they are always focussed. Winning against them always adds to the confidence. I played aggressively from the start it helped me to win.”
There will be no all-Japanese match in the women’s final after defending champions Miyuki Maeda-Satoko Suetsuna and second seeds Mizuki Fujii-Reika Kakiiwa were eliminated in the semi-finals.
Maeda-Suetsuna, who have suffered a dip in form since winning back-to-back titles in India and Malaysia last year, were shown the door by unseeded Chinese pair Bao Yixin-Zhong Qianxin (right).
The young Chinese pair, who had upset top seeds Ha Jung Eun-Kim Min Jung in the quarter-finals, outwitted their Japanese opponents 25-23, 21-14 in 54 minutes.
Fujii-Kakiiwa put up a stronger fight but in the end, bowed out to South Korea’s Jung Kyung Eun-Kim Ha Na 11-21, 21-18, 21-19.
In men's doubles, Thailand’s Bodin Issara-Maneepong Jongjit kept their nerve under pressure to outlast Indonesians Angga Pratama-Ryan Agung Saputra 21-15, 20-22, 21-15 in 48 minutes.
They will face second seeds Ko Sung Hyun-Yoo Yeon Seong for the title on Sunday. The South Koreans booked their tickets to the title decider by taking out Malaysian youngsters Goh V Shem-Lim Khim Wah 21-15, 21-16.
For full results, click here.