Asian stocks rose for a fourth day, with the regional benchmark gauge climbing the most in a month, as Japanese shares were boosted by the yen weakening against the dollar and amid optimism the global economy is recovering.

Nikkei 225 13,978.44 +405.52 +2.99%

Hang Seng 22,382.89 +207.55 +0.94%

S&P/ASX 200 5,196.57 +8.29 +0.16%

Shanghai Composite 2,123.11 +24.66 +1.18%

Nissan Motor Co. climbed 3.2 percent, leading Japanese exporters higher as the yen touched a one-month low against the dollar.

Tokyo Electric Power Co. gained 3.4 percent after the government said it may may spend 47 billion yen ($473 million) to control radiation leaks at the Fukushima Dai-Ichi nuclear plant.

Rio Tinto Group , the world’s second-biggest miner, led raw-material producers higher, rising 3.1 percent in Sydney after metals prices advanced.