Tokyo stocks opened nearly flat Wednesday as bargain-hunting following the market’s three-day drop was offset by fears over the Omicron COVID-19 variant after Japan confirmed its first case the previous day. In the first 15 minutes of trading, the 225-issue Nikkei Stock Average rose 13.17 points, or 0.05 percent, from Tuesday to 27,834.93. The broader Topix index of all First Section issues on the Tokyo Stock Exchange was up 1.08 points, or 0.06 percent, at 1,929.43. Gainers were led by marine transportation, and pulp and paper, while air transportation and mining issues led decliners. At 9 a….