http://www.j-wave.co.jp/special/j-wave20th/
there's something about a special jingle that underworld did for this. looks by the date that is over now.
I've been all over that j-wave site but can't find more.
Playlist was updated and now only shows songs played after 5am .jp time.
I think it was played during 'groove line' (19:31 .jp time) which gets podcasted some days of the week and spread via Itunes.
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http://kwiebusch.blogspot.com Underworld fan weblog
Karl: adrenaline is my drug of choice, the kick-drum is my dealer (Osaka 2005 gig)
Underworld Socks!!! - Danielle Short during 2007 Southampton backstage broadcast.