Sound Horizon, abbreviated by fans as Sanhora, is a Japanese musical group with composer Revo as the leader. They call themselves the 'fantasy band'.
Their music is generally in omnibus style; an album contains multiple stories with different themes that create one long story. Soprano or mezzo-soprano vocals are mainly utilized. Usage of narration is not restrained. Strong anime influences and applications are apparent in their music; they have started inviting seiyū for narration since their major debut. Their lyrics are very often mysterious and metaphorical, even more so than those of other J-rock musicians, with themes varying from fantastic ones like ancient curse, legend, dreams, war, and paradise to forbidden lust, longing, obsession, crime, relationships, etc.