CHIBA, Japan - Japan's big name electronic manufacturers are readying flat-screen TVs that can show high-definition movies and video games in 3D for launch next year.

At the country's biggest consumer electronics show that opened Tuesday just outside of Tokyo all the major makers displayed 3-D prototypes. Sony Corp. and Panasonic Corp. said they would bring their first models to market next year.

The companies are plowing ahead even before there is much content available, with spokesmen saying only that preparation is under way. Demonstrations at the exhibitions were mainly short clips of movies, nature scenes and sports.

Current technology requires that viewers wear special electronic glasses so early buyers are unlikely to watch everyday TV on 3D sets.

Some companies such as Sharp Corp. displayed 3D sets at the show but are waiting until there is more content available before they set a product launch date.