This particular bit of nonsense, a “comic opera” in two acts, with music by Arthur Sullivan and words by W.S. Gilbert, their ninth of fourteen operatic collaboration, opened in March 1885, in London, where it ran at the Savoy Theatre for 672 performances, the second-longest run for any work of musical theatre, and one of the longest runs of any theatre piece up to that time. Since then it’s been translated into numerous languages, and is one of the most frequently played musical theatre pieces in history. The setting is Japan, an exotic locale far away from Britain, which allowed Gilbert to satirise British politics and institutions more freely by disguising them as Japanese. And the company has done an excellent job of the now-traditional exercise in updating the lyrics of some songs to reflect politics Britain in 2019. Particularly pointed was Ko-Ko’s (The Lord High Executioner’s) song about who he’d like to execute (“I’ve got a little list, and they’ll none of them be missed”).