Batra, who won a bronze at the Commonwealth Championships here earlier this month, stunned the third seeded Japanese 9-11 11-9 11-7 10-12 11-3 12-10 in the quarterfinals.
The 18-year-old Indian will now meet another Japanese Ayane Morita in the last four round to be held later today.
Batra had earlier defeated Germany's Theresa Kraft 13-11 11-3 11-9 10-12 11-7 in the round of 16.
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