1st Anniversary Song Campaign (1周年記念楽曲追加キャンペーン) was a song campaign held during Project SEKAI's 1st anniversary.
Song list
| Release date | Song | Producer(s) |
|---|---|---|
| 9/30 | Gunjou Sanka | eve |
| 10/1 | Roshin Yuukai | iroha(sasaki) |
| 10/2 | Lost One no Goukoku | Neru |
| 10/3 | MACHINEGUN POEM DOLL | cosMo@BousouP |
| 10/4 | Venom | Kairiki Bear |
| 10/5 | Haikei Doppelganger | kemu |
| 10/6 | Telecaster B-Boy | Surii |
| 10/7 | TOKIO FUNKA | takamatt |
| 10/8 | Akuma no Odorikata | Kitani Tatsuya |
| 10/9 | Dareka no Shinzou ni Nareta Nara | YurryCanon |
| 10/10 | Marshmary | MIMI |
| 10/11 | Migikata no Chou | NoriP |