Microsoft Translator is the company’s cloud-based translation service, primarily geared towards business use. With the latest update, version 3.0.183, the Android app now supports Japanese voice translation.
As with any of the supported languages, users can simply speak into the app to translate to/from Japanese. Microsoft Translate even has a conversation mode, where each person can hold down on a microphone and the phone will read out the translation in real-time.
Microsoft Translator now supports Japanese voice translation was written by the awesome team at Android Police.