TOKYO, July 7 - Japan's Nikkei average was up by more than two percent in Monday afternoon trade, led by gains in tech issues such as NEC Corp <6701.T> as domestic investors snapped up blue chips on the brighter outlook for the domestic economy. The Nikkei <.N225> was up 2.09 percent at 9,746.97 at 0348 GMT, adding to a 4.9 percent climb last week when the benchmark was boosted by a surprisingly strong quarterly "tankan" corporate sentiment survey from the Bank of Japan//