In Gilbert and Sullivan's "The Mikado", there are a huge number of "slip ups" regarding Japan. However, as Gilbert wasn't really attempting to be accurate, and was actually satirizing England, these can be allowed to pass. However, there are a few slip ups that do not involve Japanese culture.

One of these occurs in the song "There is Beauty in the Bellow of the Blast", near the end of Act II. Koko says that he "would like to see a tiger from the Congo or the Niger." There are no tigers in Africa, as they are indigenous to India. And the Niger, though it rhymes with "tiger", is in Africa.