| Artist name | Roles | Recordings |
|---|---|---|
| Crazy Loop | ||
| 平原綾香 | ||
| Robert Plant Esq. (Robert Adam Plant) | ||
| Switchfoot | ||
| YUKI (Japanese singer of JUDY AND MARY) |
| Artist name | Roles | Recordings |
|---|---|---|
| Crazy Loop | vocal | Love Is a Simple Thing, Tango, The 24th Letter |
| 平原綾香 | arranger | Everyday, Gradation |
| Robert Plant Esq. | vocal | The 24th Letter |
| Switchfoot | vocal | Stars |
| YUKI | arranger | プリズム |