| Artist name | Roles | Recordings |
|---|---|---|
| Orkiestra Symfoniczna Filharmonii Narodowej | performing orchestra | CHRisTmas in the SiLenT ForeSt |
| 三沢またろう | percussion | CHRisTmas in the SiLenT ForeSt |
| 篠崎正嗣ストリングス | strings | dew |
| Artist name | Roles | Recordings |
|---|---|---|
| シートベルツ | vocal | DIAMONDS, EINSTEIN GROOVIN’, PEARLS |