Some elements that persist throughout their music are resounding, jangling guitar chords, throbbing, prominent bass lines, harsh roars of electronically distorted noise, and ambivalent melodies that wander between major and minor keys, as well as Sakurai's distinctive rich baritone voice. Sakurai is famous for the erotic decadence of his lyrics (which are now predominantly in Japanese), but he also often addresses existential psychological themes. The song "Rakuen (Inori Koinegai)" caused controversy because some of the lyrics were lifted from the Quran and later the album was re-issued with the offending part removed by November 1995. Imai has written many songs that read like science fiction stories, involving genetic engineering and computer hackers, but more recently has branched out into simple love songs.