Nikkei up 0.6 pct as Advantest, exporters rise on yen

(Updates to opening)

TOKYO, April 20 (Reuters) - The Nikkei average rose 0.57 percent on Friday as investors picked up exporters such as Advantest Corp. (6857.T), encouraged by a softer yen.

The Nikkei .N225 was up 99.59 points at 17,471.56 as of 0001 GMT. The TOPIX added 0.32 percent to 1,712.35.