04. August 2013 Photos: 2013.08.04 - BABYMETAL in Rock In Japan Festival BABYMETAL performed with Babybones in the Rock In Japan Festival 2013 at Hitachinaka. Official photos below including photos with the Amuse mascot Mimiy. Show report, CLICK HERE. BABYMETAL at Hitachinaka for the Rock In Japan Festival tagPlaceholderTags: Photos2013