| Say "I Love You." | Friendship ~ for Sukitte Ii na yo. | Ritsuko Okazaki | 2012 |
| Sister Princess: Re Pure | Lyric | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Sugao | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Sweet Dreams | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Sorewa Atashi no Kokoronano | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Egaoniwa Kanawanai | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Reminiscence | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Magie | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Be Happy, Please! | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Haru no Yorokobi | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Mamoritai Hito Ga Ite | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Issho ni Tabeyo | Ritsuko Okazaki | 2002 |
| Sister Princess: Re Pure | Romantic Connection | Ritsuko Okazaki | 2002 |
| Princess Tutu | Morning Grace | Ritsuko Okazaki | 2002 |
| Princess Tutu | Watashi No Ai Wa Chiisaikeredo | Ritsuko Okazaki | 2002 |
| Fruits Basket | For Fruits Basket | Ritsuko Okazaki | 2001 |
| Fruits Basket | Chiisana Inori | Ritsuko Okazaki | 2001 |
| Fruits Basket | Serenade (セレナーデ) Pf Solo Ver. | Ritsuko Okazaki | 2001 |
| Christmas in January | Fuyu no nai Calendar | Ritsuko Okazaki | 1991 |
| Magical Princess Minky Momo: Hold on to Your Dreams | Yakusoku | Ritsuko Okazaki | 1991 |
