TOKYO — Jupiter Telecommunications, Japan’s biggest cabler, will start streaming sports, news, drama and other programs simultaneously with regular broadcasts, a first in the local biz.

J:Com’s new streaming service, skedded to launch in April, will offer viewers a chance to catch up on programs they have missed — or even stream them live, according to a report in the Nikkei newspaper.

Until now, streaming services in Japan have offered programs only after the finish of their regular broadcasts.

Also, J:Com announced that it will shorten the window for streaming feature films from the current six months to three months after theatrical release.

J:Com hopes the new service will boost revenues from its streaming biz from $33 million in 2009 to $56 million this year.