- 2006-01-25 Psychedelic Memory released.
- 2007-10-00 IKUTO forms solo project Regulus as the sole member, and performs all positions.
- 2008-04-00 Guitarist SHINO and bassist KHAI join.
- 2008-05-25 SYNTHESIS released.
- 2008-06-00 Vocalist RIHITO-RIHITO- (麗人-リヒト-) joins.
- 2008-06-00 Guitarist KUSSUN joins.
- 2008-06-00 Bassist KHAI changes his name to χ-KHAI- (χ-カイ-).
- 2008-06-00 Regulus officially starts full-scale band activities with its first live at HOLIDAY OSAKA.