K.yuko
| K.yuko | |
| Language | Japanese |
| Title | Released | Role | As | Note |
| Mizu no Kakera -once summer of islet- | 2002-08-09 | Vocals | K.yuko | OP "Natsuyoi" |
| Mizu no Kakera -once summer of islet-ORIGIN | 2004-08-13 | Vocals | K.yuko | OP "Natsuyoi", ED "Mizu no Kakera" |
| K.yuko | |
| Language | Japanese |
| Title | Released | Role | As | Note |
| Mizu no Kakera -once summer of islet- | 2002-08-09 | Vocals | K.yuko | OP "Natsuyoi" |
| Mizu no Kakera -once summer of islet-ORIGIN | 2004-08-13 | Vocals | K.yuko | OP "Natsuyoi", ED "Mizu no Kakera" |