I remember a bit on the SciFi channel in the early 90's about this, but the show sadly never made it to the states. (Or anywhere outside of Japan?)
The camera work isn't the greatest, and the angle gives away a few stage tricks too.
Unless there's ever an official recording released, or they revive it in Vegas, this glimpse may be all we ever get!
Here are all the individual links in case you want to skip to the good stuff. ;)
Part 1: Willow (Was it a big hit in Japan?)
http://www.youtube.com/watch?v=WqdmrxSZ1rM
Part 2: More Willow...
http://www.youtube.com/watch?v=GAdOElL8ISY
Part 3: "Tucker: A Man and his Dream" dance number. There wasn't room for a Howard the Duck sequence I guess...
http://www.youtube.com/watch?v=i12Zc4ENZZY
Part 4: Indiana Jones! (There's a long musical intermission when they get to Club Obi Wan where not a lot is going on except for an acrobat act...)
http://www.youtube.com/watch?v=zE8rwSXZmys
Part 5: The action finally starts, and Anything Goes! The Indy set pieces here are pretty impressive.
http://www.youtube.com/watch?v=s1B-4BPjxME
Part 6: End of Indy, then into American Graffiti. (What, no THX 1138 dance number?)
http://www.youtube.com/watch?v=83PuFuPpUvU
Part 7: End of AG, the finally some Star Wars!
http://www.youtube.com/watch?v=N080exPubvA
Part 8: I don't recall strippers in the Cantina scene before. Darn you, George!
http://www.youtube.com/watch?v=TmTf2U2I7o4
Part 9: Luke and Vader battle it out, with a twist ending!
http://www.youtube.com/watch?v=_GhSu16xMR4