Nikkei gains as yen drives techs higher

(Updates to opening)

TOKYO, May 23 (Reuters) - The Nikkei share average gained 0.47 percent at the start of trade on Wednesday, as a weaker yen drove technology stocks such as Sony Corp. (6758.T) higher.

The Nikkei .N225 was up 78.74 points at 17,758.79 as of 0005 GMT. The broader TOPIX index was up 0.66 percent at 1,742.94.