Some years ago, back when the only Macs I encountered were the less-than-average ones installed in my university laboratories, I read somewhere that Mac usage in Japan was actually higher than the average around the world. That wasn't one of the reasons I bought a Macbook for my most recent computer upgrade, but I would have thought that everything I ever wanted to watch or listen to would be available on Mac as well, given the supposedly high usage.
Unfortunately...certain online radio broadcasting websites have, in recent years, started limiting broadcasts to windows software on windows computers. There are a couple of alternative sources...but they're really limited by the broadcasting company that seems to want to micromanage the distribution of that program.
WHY!?! I want to listen! Please please provide it as an iTunes podcast or something!