іSpeak is a translator and speech synthesis software packaged into one easy to use iOS application. Type (or copy and paste if you wish) a phrase in your native language and get the phrase BING-translated into Japanese and spoken back to you. Hit "+" to save to your phrase book to replay later to your friends or better yet native speakers. Have fun with it. Now it is easy to speak Japanese.
Unlike other speech synthesis/translator applications in the app store, we do not limit native language to English only. So if English is not your mother tongue, this app is for you. Now you could speak Japanese too and this is the only app that makes it easy.
Finally, if you are adventurous enough to change your iDevice language settings… well, you know already then where we are going with this, right? Have fun.