Asian stocks rose, with the Nikkei 225 Stock Average climbing to a 4 1/2-year high after the Bank of Japan’s unprecedented stimulus. Chinese and Taiwanese shares fell after more infections from a deadly new strain of bird flu.

Nikkei 225 13,192.59 +358.95 +2.80%

Hang Seng 21,743.38 +16.48 +0.08%

S&P/ASX 200 4,905.5 +14.07 +0.29%

Shanghai Composite 2,211.59 -13.70 -0.62%

Toyota Motor Corp., the world’s biggest carmaker, gained 4.1 percent as the yen weakened to its lowest level since June 2009 and all but seven of the companies on the Japanese gauge advanced.

EVA Airways Corp., Taiwan’s second-largest carrier, slumped the most in 21 months in Taipei, dragging the nation’s equities benchmark to the biggest slump since June.