Black Sabbath and Slipknot confirmed to appear.
Black Sabbath and Slipknot are the first two acts to confirm their presence at Ozzfest Japan 2013.
Slipknot will be performing on the 11 May, while Black Sabbath will headline the event's second day, on the 12th.
Black Sabbath have recently announced dates in Australia, with rumours of UK dates to be confirmed in the near future.
However, Sabbath fans can rejoice with the certainty that the band's upcoming album - their first since 1978 - will be released in April 2013. The band are currently in the studio working with Rick Rubin.
source: planetrock.com
