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TOKYO, Aug 18 (Reuters) - Japan's Nikkei gave up early gains on Tuesday afternoon hurt by futures markets and weakness in Asian shares, with investors remaining risk-averse amid worries about a slowdown in the Chinese economy.
The Nikkei share average dropped 0.2 percent to 20,586.25 in mid-afternoon trade, surrendering all of its modest gains in early trade.
Selling in Nikkei futures in late morning trade weighed on the market. Index-heavyweight stocks led the losses, with Fast Retailing Co falling 1.6 percent and SoftBank Group Corp dropping 0.8 percent, taking 35 points and 7 points off the Nikkei index, respectively.
On the other hand, the broader Topix gained 0.1 percent to 1,673.99 and the JPX-Nikkei Index 400 was flat at 15,076.21. (Reporting by Ayai Tomisawa; Editing by Jacqueline Wong)