Just about every major band in existence has a tribute band. A few years ago, Q and I saw a very good Beatles tribute band on one of our Ohio trips (and we've caught the one that plays in the British section of EPCOT more than once). Well, why should tribute bands be limited only to those major bands "in existence"? Turns out that even non-existent bands, like The Rutles (a parody of The Beatles created by Eric Idle and Neil Innes years before This Is Spinal Tap), can have real tribute bands. In this case, the band is named "Ouch!" (after the Rutles' version of "Help!") and have their own MySpace and YouTube pages.
EDIT: Why am I not surprised that there's another Rutles tribute band in Japan?