TOKYO (AFP) - Tokyo stocks jumped 2.26 per cent Wednesday morning with Japanese exporter shares getting a lift from the weaker yen, following a rise on Wall Street bolstered by strong US corporate earnings.

The Nikkei 225 index added 316.92 points to 14,313.73 by the break, while the Topix index of all first-section shares climbed 1.92 per cent, or 21.79 points, to 1,157.88.