TOKYO—Aiming to rejuvenate sales of its hand-held game machines, Nintendo Co. plans to sell a new portable 3-D gaming device that won't require special glasses.

For months, Nintendo has been rumored to be working with chip makers on a new portable gaming device to succeed the DS, the best-selling portable videogame system ever, with more than 125 million units sold since its launch in late 2004.

Smartphones...