Customers wait to buy Nintendo's computer game console, Nintendo 3DS, at retail chain Yamada Denki in central Tokyo, Saturday, Feb. 26 ,2011. The Nintendo 3DS, offering glasses-free 3-D images, has gone on sale in Japan, ahead of a global rollout, and analysts say it promises to be the world's first 3-D mass-market product. (AP Photo/Koji Sasahara)