Nikkei up on yen, Wall St but uncertainty weighs

Japan's Nikkei stock average nudged higher on Monday but struggled to extend gains as uncertainty over Japan's economic outlook and a prolonged nuclear safety crisis curbed enthusiasm on a weaker yen and a rise in U.S. shares after strong payrolls data.
The Nikkei peaked at a session high of 9,808.60, lifted by blue-chip exporters, but shied away from a two-week high of 9,822.06 hit on Friday and its 200-day moving average also seen near Friday's high.
The benchmark index closed up 0.1% at 9,718.89, with small-cap reconstruction-related shares and smelters outperforming the market on expectations for a pick up in demand, while the broader Topix shed 0.3% to 859.75.