In the English dub of this installment, Amano Jaku is clearly voiced by a different actor, who just happens to share the same "Christopher Courage" alias as his voice actor from the first movie.
In the original Japanese audio, Munchausen II is voiced by Demon Kakka, who is a famous heavy metal musician that is best known for being the lead singer of the heavy metal band known as Seikima II. This also makes Urotsukidoji one of the few Hentai titles, or possibly even the only Hentai title, to feature a celebrity as one of the voice actors. Additionally, Munchausen's appearance bears quite a resemblance to Demon Kakka (spiked hair, black lipstick, cape, and outfit).