One Piece: Kaizoku Musou was well-received in Japan, so much so that it was recently announced for a US release as One Piece: Pirate Warriors. Of course, many “hardcore” anime fans prefer to have the option of a Japanese language track, and it was widely feared that a US release of Pirate Warriors would eschew its original language.
Fear no more.
Having witnessed and played One Piece: Pirate Warriors on the E3 show floor, I can confirm that Yes, Virignia, There is a Japanese Audio Track. Pirate Warriors will contain both English and Japanese language tracks, with the option for English subtitles.
I imported this from Japan, but with this announcement, I can also confirm that I personally will be re-purchasing it!