TOKYO, Nov 21 (Reuters) - The dollar rose over one yen from the day's lows on Friday as Tokyo share prices turned positive in the afternoon, and after Japanese Finance Minister Shoichi Nakagawa said authorities must be ready to deal with big swings in markets.

The dollar rose to as high as 94.89 yen JPY= on trading platform EBS, up more than 1 yen from an intraday low of 93.65 yen.

In the stock market, the Nikkei share average turned positive in the afternoon after falling three percent earlier, and extended gains to rise 1 percent .N225. (Reporting by Masayuki Kitano)