Tokyo  - Tokyo stocks ended Thursday morning trading up, following positive signals from Wall Street and the yen's weakening against the dollar.

The benchmark Nikkei 225 Stock Average was up 134.28 points, or 1.66 per cent, to 8,240.57 at mid-trading, while the broader Topix index of all first section issues also rose 12.51 points, or 1.56 per cent, to 816.84.

On currency markets at 9 am (0000 GMT), the dollar was quoted at 90.27-37 yen, down from Tuesday's 5 pm quote of 89.15-18 yen.

The euro traded at 1.3149-54 dollars, down from Tuesday's 5 pm quote of 1.3268-71 dollars, and at 119.00-05 yen, from 119.31-35 yen. (dpa)