On the way back from Japan, surprisingly I didn't listen to my iPod music. I found out that Lufthansa has 30 different radio channels with different music from all over the world, and just spent my 10 hours listening to what they had to offer. Indian, Arabic, Italian, Tamil, French, Korean, Japanese, Mandarin, Hispanoamericana, Brazilian & African channels further enforced the point that international music is not only about the typical Anglo-saxon pop and rock charts.
I even found about a Berliner radio station, Radiomultikulti, that broadcasts music from all over the world. However, I'm not sure they'd have the Japanese punk band I just discovered in Tower Records Shibuya.