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Masa
Well, Today NHK (Japan Broadcasting Corporation) Says,
NHK has got the preliminary license to broadcast the Digital Radio.

Japan has started the BS Digital last December, but still the NHK don't broadcast the Digital Radio.

Coming Up, they try to test broadcasting to broadcast in 2003!

News article :
NHK News

And more details about BS Digital in Japan,
please check here.

NHK Digital in English

But sorry for NHK news is in Japanese only