* 闇の王子 (Yami no Ōji): This is a very literal translation, meaning "Prince of Darkness." It's straightforward and widely understood. This is probably the closest and most commonly used option.
* 暗黒の王子 (Ankoku no Ōji): This translates to "Prince of Darkness" but uses "Ankoku" (dark/obscure) instead of "Yami" (darkness). It might sound slightly more formal or literary.
* 魔王 (Maō): This translates to "Demon King" or "Evil King." While not a direct translation, it captures the powerful, evil nature often associated with the "Prince of Darkness." This is a good option if you want to emphasize the evil aspect.
* 堕天使 (Datenshi): This means "fallen angel," which is a common association with the Prince of Darkness. This option is suitable if you want to highlight the angelic origin of the character.
The best choice will depend heavily on the specific context in which you're using the phrase. If you can provide more context, I can help you choose the most appropriate translation.