沙耶之歌
The three-ending structure of Saya no Uta
The author divides three outcomes based on who receives relief and who bears the sacrifice. The same relationship may be a relief for one person but a loss for another; Each ending changes the distribution of these characters, so there is no common outcome where all characters are saved simultaneously.
Ryoko Tanbo (Song of Saya)
The doctor responsible for treating the aftereffects of Yu Ji's accident.
Ikuki Niosaka (Song of Saya)
The protagonist is trapped by the boundary between reality and nightmare after a traffic accident.
Koji Too (Song of Saya)
Yu Ji's close friend.
The ending of the world changes
Saya's Reproduction Changes the World, with the ending theme featuring the song of the same name, 'Saya no Uta.'
The hospital farewell ending to the song of Saya
Saya left a message on her phone and left without showing up. Urobuchi interprets it as a love story wrapped up by parting, pointing out that the meaning of the information scene depends on the input method of keypad phones at the time.
Yosuke Suzumi (Song of Saya)
A neighbor near Yuki's residence once complained about the strange smell and was subsequently drawn into a conflict caused by Saya.
Saya (Song of Saya)
A mysterious girl who meets Ikuki while searching for her missing father.
Yoyo Tsuku (Song of Saya)
A close friend from Qinghai, who once had feelings for Yu Ji.
Takahata Seimi (Song of Saya)
Koji's lover and also Yao's friend.
Masahiko Ougai (Song of Saya)
Saya is searching for her missing father.
Saya no Uta Nitro The Best! Vol.2 edition
A reissue released on July 31, 2009.
Saya no Uta, Windows 10 compatible version
A new PC version released on April 28, 2017.
Beyond Oblivion (The Night Before Oblivion× Saya no Uta collaboration theme song)
For the 2026 mobile game "The Night Before Forgetting" and "Saya's Song" collaboration theme song, the singer's official production list lists three production roles.
SILENT SORROW
2004 'Saya no Uta Original Soundtrack' Track 13, composed by Yo Oyama. The tracks are based on music from the original 2003 work.
SHAPESHIFT
2004 'Saya no Uta Original Soundtrack' Track 09, composed by Shintaro Jinbo. The tracks are based on music from the original 2003 work.
SCARE SHADOW
2004 Song 10 of 'Saya no Uta Original Soundtrack', composed by Shintaro Jinbo. The tracks are based on music from the original 2003 work.
SAVAGE
2004 'Saya no Uta Original Soundtrack' Track 12, composed by Shintaro Jinbo. The tracks are based on music from the original 2003 work.
SCREAM
2004 'Saya no Uta Original Soundtrack' Track 11, composed by Shintaro Jinbo. The tracks are based on music from the original 2003 work.
SUNSET
2004 'Saya no Uta Original Soundtrack' Track 08, composed by Shintaro Jinbo. The tracks are based on music from the original 2003 work.
SONG OF SAYA II
2004 'Saya no Uta Original Soundtrack' Track No. 06, composed by Toshimichi Isoe. The tracks are based on music from the original 2003 work.
SONG OF SAYA I
2004 'Saya no Uta Original Soundtrack' Track 05, composed by Toshimichi Isoe. The tracks are based on music from the original 2003 work.
SIN
2004 'Saya no Uta Original Soundtrack' Track No. 07, composed by Toshimichi Isoe. The tracks are based on music from the original 2003 work.
SEEK
2004 'Saya no Uta Original Soundtrack' Track 03, composed by Shintaro Jinbo. The tracks are based on music from the original 2003 work.
SCHIZOPHRENIA
2004 'Saya no Uta Original Soundtrack' Track 01, composed by Shintaro Jinbo. The tracks are based on music from the original 2003 work.
SABBATH
2004 "Saya no Uta Original Soundtrack" Track 02, composed by Yoshihiro Kawagoe. The tracks are based on music from the original 2003 work.
SPOOKY SCAPE
2004 'Saya no Uta Original Soundtrack' Track 04, composed by Yoshihiro Kawagoe. The tracks are based on music from the original 2003 work.
Underground research lab of Oyai Villa
A hidden research space at the bottom of the well at Ogaya Villas. While rescuing Koji, Ryoko finds the entrance, remains, and research records on the wall.
Tominaga was delighted
Kazuki Tominaga credited the entire 2004 original soundtrack for "Saya no Uta," which was produced as a complete mastering tape.
Hisashi Sakane
Hisashi Sakane credited the entire 2004 original soundtrack CD production and mixing project for "Saya no Uta."
F.R.K.@B.I.A.V. Studio
F.R.K.@B. I.A.V. Studio credited the 2026 "The Eve of Forgetting" collaboration theme song and composed the song for "Song of Saya."
Shintaro Jimbo
Shintaro Jimbo credited the original BGM composition and guitar/bass for 'Saya no Uta'.
Masaki Onizawa
Onizawa Yawai credited the 2003 PC original Japanese dubbing for 'Saya no Uta'.
The ending of the Farming Office
Koji and Ryoko continue their investigation and face their final confrontation with Ikuki and Saya. After the incident, Koji was still tormented by nightmares and hallucinations.
Song of Saya
Nitroplus's suspenseful horror ADV. After the traffic accident, Ikuki Niosaka's words and actions change from the world before him; Saya meets him at the hospital while searching for her missing father, and friends, lovers, and the attending doctor each step in from their own perspectives.
Saya no Uta Original Soundtrack
The original work-related music CD includes 13 BGM tracks and two theme songs. MusicBrainz recorded the record number HBMS-008 and its Japanese release on February 27, 2004. Each track is listed separately by composer in the track record.