Nikkei loses 1.2%
Japan's benchmark index retreated from the previous day's one-week high on earnings pessimism even as dollar-yen traded within sight of Wednesday's two-week high.
Investors largely shrugged off news that the Bank of Japan left its monetary stimulus program unchanged at a policy review Thursday, as widely expected.
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In earnings news, All Nippon Airways fell over 4 percent after slashing its full-year forecast by nearly a half. Carmaker Honda Motor eased 1.2 percent after keeping its operating profit guidance unchanged while Nintendo fell nearly 2 percent after posting a bigger-than-expected quarterly loss.
Toshiba closed down 5.2 percent on concerns that it relies too heavily on NAND memory chips as its key earnings driver, a day after reporting a 14 percent fall in first-half net profit.
Kospi down 1.4%
Seoul stocks tracked closed at its lowest levels in two weeks, a day after closing at a 27-month high as foreigners snapped their buying streak. Caution also set in before Friday's preliminary export growth and trade balance data.
Index heavyweights Samsung Electronics and Hyundai Motor lost 2.3 and 3 percent, respectively while Korean Air slumped 11 percent on news that it is injecting 150 billion Korean won into its sister firm Hanjin Shipping.