The music, which opens with koto, is the Kojo no tsuki composed by Rentaro Taki in 1901. The title signifies the moon viewed from a desolate castle. It is one of the oldest Japanese songs written on the Western scale. Bansui Doi wrote a poem to this music at the Aoba castle in Sendai.
An arrangement for a shakuhachi and orchestra of a melody composed by Rentaro Taki (1879-1903). He is well known to Japanese people as an earliest composer of Western music in Japan.
He composed many nice songs for primary and middle school pupils, and they are quite popular among Japanese still now. "Kojo no Tsuki" is one of them. Kojo is a ruined castle and tsuki is the moon. The poem for the original song describes the moonlight over the ruined castle and expresses the longing for the days when the castle was prospering.
"Kojo no Tsuki" ("The Moon Over the Lake"), is a duet composed by Nakao Tozan in 1922 at his home during a late fall evening in Tokyo. It depicts the cool autumn air as it whips up small ripples on a lake, each of which reflects the moon. The latter half of the piece features a 3/8 rhythm which suggests the moonlight as it wavers on the waves. This piece was the first to utilize three-beat rhythm in shakuhachi music.