The new technology, known as "One Seg," after "One Segment," was offically introduced to the Japan market on Saturday. "One Seg," allows users to watch digital television broadcasts on mobile telephones.

Handsets have been on the market in Japan for several weeks that are equipped with the service, which can also broadcast programs onto laptop computers, high-end video-game machines and other terminals.

The service will be free for now and programming will be the same as on home televisions as mobile operators examine whether One Seg will prove to be popular.

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