Capcom also told kotaku.
Updated on September 5th, at 14:50: We have since been told by Capcom that it is "planning to release Ace Attorney 5 in the West". Capcom will "have more news soon".
Capcom has confirmed to me that Ace Attorney 5 is indeed coming to the U.S. Here's their statement:
Capcom is planning to release Gyakuten Saiban 5 (Ace Attorney 5) in the West. We'll have more news soon.
A Capcom representative also clarified that they use "West" to refer to both the U.S. and Europe.
Siliconera confirms too.
Sven hours ago:
So more details in a few weeks? *-*
Only Japan has been announced thus far. Let's discuss this again in a few weeks.