Nikkei tumbles to 2-1/2-month lows on weak China factory surveys, Wall St
* China factory survey dents sentiment further
* Strong yen hurts exporters
* Oil shares rise after oil prices gain
* Takata soars after Sankei says automakers are discussing support
By Ayai Tomisawa
TOKYO, Jan 4 (Reuters) - Japan's Nikkei share average tumbled to 2-1/2-month lows on Monday as weak China factory activity surveys and year-end losses on Wall Street discouraged investors on the first trading day of 2016.
China's factory activity contracted for the 10th straight month in December and at a sharper pace than in November, a private survey showed.
The Nikkei extended earlier losses after the news, falling as far as 2.7 percent to 18,518.60 points, its lowest level since Oct. 22.
"In early trade, domestic buyers seemed to be contributing to trimming the declines, but after the China survey was out, foreign investors' selling accelerated," said Yutaka Miura, a senior technical analyst at Mizuho Securities. Continuación...