o1 is the first studio album by Hiroyuki Sawano's vocal project SawanoHiroyuki[nZk].

[1][2] The album charted #7 daily rank for first week.

was used as the opening theme for the anime television series "Seraph of the End", while "scaPEGoat" was used as the ending theme.

[4] All music is composed by Hiroyuki Sawano Adapted from Booklet.

[2]Management Staff Hiroyuki Sawano: Aimer: Yosh (Survive Said the Prophet): mizuki: Instruments