Nikkei up 0.8% after sell-off; exporters, banks rise

(Updates to midsession)

TOKYO, May 27 (Reuters) - Japan's Nikkei stock average rose 0.8 percent on Tuesday, rebounding from a two-week closing low hit the previous day, with stocks that had fallen sharply such as Toyota Motor Corp and banks regaining ground.

Major paper firms surged, with Hokuetsu Paper Mills Ltd jumping nearly 7 percent after