Tokyo  - Optimism over a global economic recovery and gains on the US and European markets sent Tokyo stocks up in Tuesday morning trading with high-tech, exporter and commodities-related issues seeing some of the biggest gains.

Investors, however, were cautious ahead of the release of corporate earnings reports, moderating a fifth-straight trading day of gains.

The benchmark Nikkei 222 Stock Average was up 38.76 points, or 0.39 per cent, to 10,055.15.

The broader-based Topix index also gained ground, rising 3.27 points, or 0.36 per cent, to 901.1.

On currency markets at 9 am (0000 GMT), the dollar traded at 89.69-73 yen, up from Friday's 5 pm quote of 88.28-29 yen, after Japanese markets were closed Monday for a holiday.

The euro traded at 1.4790-92 dollars, up from 1.4724-26 dollars Friday, and at 132.66-70 yen, up from 131.46-50 dollars. (dpa)