This boosted shares in Japanese exporters of consumer goods and computer games, and the Nikkei 225 Average shrugged off the yen woes and closed up 265.04 points to 10,457.61, a hearty 2.6% gain. The slide in the yen to a three-year low of 131 to the dollar in early trading was seen as a further boost to the sales of games such as Sony's PlayStation 2 and similar products from other Japanese companies. Sony shares gained almost 3% and electronics groups whose chips power the hi-tech products rose in step.