I won't write another post introducing SBS podcasting, I'll just copy/paste what I wrote at KoreanClass. You can just substitute every instance of "Korean" and "KoreanClass" with "Japanese" and "Japanesepod".
http://www20.sbs.com.au/podcasting/index.php?action=browse&catid=7
Someone from Chinesepod put me onto SBS podcasting. SBS (Special Broadcasting Service) is an Australian network that puts on TV and radio shows that the major networks don't put on. Of course, this means that sometimes they are rubbish, but you get some real gems!
Follow the link and you'll come to a page with links to various programs. I'm KoreanClass listeners will be interested in SBS Korean, but multi-lingual listeners (Hi Hyunwoo!) might find other programs/languages interesting too.
Each program has its own RSS feed, which should be familiar to KoreanClass listeners.