The VOCALOID Collection Collaboration is an ongoing partnership between Project SEKAI and The VOCALOID Collection, also known as VocaColle, in which the contest's winning songs are added to Project SEKAI.
As part of the collaboration, the #1 song from the "Miku's 16th Anniversary 1-Picture Video Upload Festival" hosted by VocaColle and Niconico in December 2023 was added to Project SEKAI. The festival lasted 3 days, and all submissions must have only one picture in their video upload, as an homage to many classic VOCALOID songs that did the same.
↑SEKAI-chan to KAFU-chan no Otsukai Gassoukyoku is the #2 winner of the Autumn 2022 TOP 100 category. The #1 winner, Netsu Ijou, was not entered as part of the collaboration with Project SEKAI.
↑Due to the #1 winner, Youkoso, Stew Udon Sentou e!! containing inappropriate content and excessive parody, the #2 winner Zunda Party Night was added instead.
SEKAI-chan to KAFU-chan no Otsukai Gassoukyoku
Tenshi no Tsubasa.
Shinjinrui
Zunda Party Night
Relay Outer
Odorobo
Igaku
Achikochi Date-san
Akotoba