This work was commissioned for the second concert of "Tubium", of which Akira Toda serves as music director. The members of "Tubium" are all first-rate professionals; they expected a difficult work not easily performed by amateurs. Therefore, the voice range is wide, and high level technique and expression are required. Especially in the 1st and 3rd movements, performing without musical expression will be unappealing, and the last movement's success will depend upon your technical mastery. Still, it is important to enjoy its musical aspect foremost, hopefully doing the entire work without stopping.