Doubles partners Misaki Doi and Nao Hibino will meet in the Japan Women's Open singles final.
Top seed Karolina Pliskova won twice on Friday to reach the last four, but US Open semi-finalist Elina Svitolina was beaten in Zhengzhou.
Tournament organisers hope the WTA Tour's Hong Kong Open can be rescheduled when ongoing protests are over.
Having failed to win a title since teaming up with Jermaine Jenkins in February, Naomi Osaka has ended their partnership.
Andy Murray, 32, was asked about renewing his battle with the ATP's 'Big Three' as he prepares to feature in the singles circuit in Asia.
After seven years away, Kim Clijsters has announced plans for a sensational return to tennis. We look at the other great WTA Tour comebacks.
All matches scheduled to be played at the Zhengzhou Open on Thursday were pushed back to Friday due to rain.