Olga Danilovic defeated Nao Hibino 6–4, 1–6, 6–2 in the first round of the WTA 250 Osaka tournament on the hard court. Danilovic, the pre-match favourite at odds of 1.41, delivered a convincing victory after a competitive opening set, though Hibino briefly levelled the match by dominating the second. The Serbian player reasserted control decisively in the third set to secure progression. Danilovic's ability to recover from the second-set loss and impose her game in the decider underscores her superiority on the day and positions her favourably for the next stage.