Apple has updated the iOS operating system to IOS 5.1, featuring Japanese language support for Siri, the voice-activated personal assistant for iPhone 4S.

Apple CEO Tim Cook said that iOS 5.1 is available to download right away, and Japanese support for Siri will be rolled out over the coming weeks.

The 5.1 update brings little else to the table, but will be available for iPhone, iPad and iPod touch.

Cook also announced a refresh to the Apple TV set-top box

Read all the details of the new iPad here.