While Japanese voice acting sounds like it should be a standard, Capcom’s own games like Resident Evil 6 and Dragon’s Dogma only have English voiceovers in Japan. Both titles will receive Japanese voiceovers as additional content either through an expansion pack or DLC. Square Enix’s Western games like Sleeping Dogs tend to only have English voice acting too.
Bioshock Interactive will also include the English text from the North American version on the disc so you can play through the game as if you had a Western copy. Well, almost. Japan has a rule about not showing graphic violence involving a character’s head, so a specific scene was edited for the Japanese version.