Sometimes we're getting tired of radiko (JP IP address required) and KeyHoleTV for Japanese radio, but I just found out a bunch of radio stations that we can freely access WORLDWIDE - it's the Simul Radio network of radio stations around Japan, and it really contains a number of radio stations that we've never heard of, and maybe some Japanese music... (I earlier heard Motohiro Hata on one of those Simul Radio participating radio stations...
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http://www.simulradio.jp/