What is the Mikado opera?

_The Mikado_ is a comic opera in two acts, with music composed by Arthur Sullivan and libretto written by W. S. Gilbert. The opera's plot revolves around Nanki-Poo, the son of the Mikado of Japan, who disguises himself as a wandering minstrel to escape his arranged marriage to the elderly Katisha. Along the way, he encounters a variety of colorful characters, including the Lord High Executioner Ko-Ko and the beautiful Yum-Yum, the ward of Ko-Ko. The opera is filled with humor, satire, and catchy melodies, and it is considered one of the most beloved and enduring works of musical theatre.