Apple has just announced from the iPad 3 event that their popular voice assistant, Siri, will be making its way to customers in Japan. It will be part of iOS 5.1 which will be available starting today. Siri will be rolled out in Japan over the next few weeks.
Siri is currently available in the United States, United Kingdom, Australia, Germany, and France. This aligns with Apple's plan to roll out Siri to even more countries during 2012.