The Nikkei Stock Average opened down 27.49 points at 66,104.49 on the Tokyo stock market on the 28th, while the TOPIX started 0.40 points lower at 4,116.82. A rebound in U.S. equities, led by semiconductor stocks after Nvidia's earnings, supported Japanese technology shares, although firmer crude oil futures and U.S. long-term interest rates limited risk appetite. Investors also awaited Fed Governor Waller's speech at the Jackson Hole conference, scheduled for the night of the 28th in Japan time. The Nikkei briefly turned positive after the open as its 25-day moving average, around 66,500, was viewed as support. Japan's July unemployment rate fell to 2.4%, below the 2.5% market forecast, while the job-to-applicant ratio held at 1.18. The August Tokyo metropolitan area's preliminary core consumer price index rose 1.8% year-on-year, above the 1.7% forecast. The index was expected to remain focused on its 25-day moving average, with direction-seeking trading likely to continue in the near term.