What is "seikima-ii"

is a Japanese heavy metal band, formed in 1982. Throughout their career they have had numerous lineups, with lead singer Demon Kakka the sole constant member. The group has sold over 10 million records in Japan alone.

According to the band, Seikima-II is a group of from the futuristic hyper-evolved dimension that preach a religion called Akumakyo in order to propagate Satan through the use of heavy metal music. Each member is a demon of a different hierarchical class, with His Excellency Demon Kakka being leader of the Akuma and His Majesty Damian Hamada being the "Crown Prince of Hell". In accordance to the prophecy and after completing their world conquest, the band disbanded at the end of the century on December 31, 1999 at 23:59:59.

However, the band has had several limited reunions since their disbandment. One in 2005 to celebrate their 20th anniversary and another in 2010 celebrating their 25th anniversary, the latter including their first ever world tour. In 2011, an encore of their world tour was held and the band hosted two charity concerts that included several different artists in response to the Tōhoku earthquake and tsunami. They performed a two leg 30th anniversary tour from September 2015 into February 2016.