Japanese stocks jumped nearly three percent in opening trade on Monday as investors cheered Tokyo winning its bid to host the 2020 Olympics, good news for construction, real estate and sportswear firms. The benchmark Nikkei 225 index, which fell 1.45 percent on Friday, opened up 2.03 percent and expanded its gain to 2.82 percent, or 390.21 points, to 14,251.02 in the first few minutes of trade.