Any English teacher in Japan can doubtless relate sweat-soaked tales of turning up for work and being given a near-impossible task to perform.

For five improvisational comics, however, every working day mimics the poor English teacher's worst nightmare -- and they wouldn't swap it for anything.

But the cast of comedy show "Whose Line Is It Anyway," which hits Tokyo for three nights from June 11, have to grapple not with vacant-eyed 15-year-olds and lectures on topics like European deodorant, but with a couple of hundred discerning ex-pats and demands for opera performances done in the style of a Hungarian porn movie -- among other things.