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) | MV | Hint |
|---|---|---|---|---|
| 9/29 | Saisei | Picon | 3DMV | No Hint |
| 9/30 | Gunjou Sanka | eve | 3DMV | No Hint |
| 10/1 | Roshin Yuukai | iroha(sasaki) | No MV | 高音のシャウトが特徴的な、鏡音リンが歌う楽曲。 A song sung by Kagamine Rin, featuring a very characteristic scream |
| 10/2 | Lost One no Goukoku | Neru | 3DMV | その号哭は止まらない。 The weeping can't be stopped |
| 10/3 | MACHINEGUN POEM DOLL | cosMo@BousouP | No MV | No Hint |
| 10/4 | Venom | Kairiki Bear | No MV | めっ！ NO! |
| 10/5 | Haikei Doppelganger | kemu | No MV | 少年は少年を失くして The boy lost himself |
| 10/6 | Telecaster B-Boy | Surii | Original MV | ま！❌ MA! ❌ (Original images from music video) |
| 10/7 | TOKIO FUNKA | takamatt | Original MV | 踊れやえびばぁでぃ！！ Dance, everybody!! |
| 10/8 | Akuma no Odorikata | Kitani Tatsuya | 3D MV | 「神とやらに惑わされるなよ」 Don't let god mislead you |
| 10/9 | Dareka no Shinzou ni Nareta Nara | YurryCanon | Original MV | 最初で最後の愛の言葉だ My very first and very last words of love |
| 10/10 | Marshmary | MIMI | No MV | 逆らってゆくの！ I'm going against it! |
| 10/11 | Migikata no Chou | NoriP | No MV | 不協和音 Dissonance |
| 10/12 | ray | Fujiwara Motoo | 3D MV | No Hint |
| 10/13 | Hello,world! | Fujiwara Motoo | 2D MV | No Hint |