The Nikkei average tumbled 1.77 percent to 50,376.53 while the broader Topix index settled 0.65 percent lower at 3,359.81.
Advantest, Tokyo Electron and SoftBank Group lost 6-7 percent. Among the top gainers, TOPPAN Holdings soared 14 percent and Tokyo Tatemono surged 10.4 percent.
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