Today I recognised there's a fax transmission on 8.467 kHz. I looked into hffax.pdf and saw that the station transmitting is Kyodo News, Japan.
So I tested if Rasperry Pi ² can decode/demodulate the fax transmission. I installed fldigi. And voilá: it works fine!!!
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| Kyodo News, Japan on 8.467 kHz | 
And here's the big picture:
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| http://i.imgur.com/YPGG6F5.jpg Kyodo New paper. I had too less lines in fldigi wefax setup :/. Whole paper next time ;). | 
Nice one :).