J1 Sy has seen 449 bands.

Band Concerts Seen
  The Darkness 7 concerts
  Fear Factory 5 concerts
  Killswitch Engage 4 concerts
  Metallica 4 concerts
  Slayer 4 concerts
  The Dillinger Escape Plan 4 concerts
  Amon Amarth 3 concerts
  Anthrax 3 concerts
  Baroness 3 concerts
  Bullet for My Valentine 3 concerts
  Deftones 3 concerts
  Iron Maiden 3 concerts
  Lamb Of God 3 concerts
  Machine Head 3 concerts
  You Am I 3 concerts
  Airbourne 2 concerts
  Alice Cooper 2 concerts
  Amyl and the Sniffers 2 concerts
  Asking Alexandria 2 concerts
  Battles 2 concerts
  Bring Me The Horizon 2 concerts
  Coheed and Cambria 2 concerts
  Dragonforce 2 concerts
  DZ Deathrays 2 concerts
  Flaming Wrekage 2 concerts