Katsuhisa Hattori

- Le Rhone
- Ongakubatake String Quartet Collection · 2017
- Sotsugyou
- Ongakubatake String Quartet Collection · 2017
- Tenshi No Enogu
- Palette · 2007
- Romance
- Ongakubatake String Quartet Collection · 2017
- Good Old Days
- Ongakubatake 22 the Final? (International Edition) - EP · 2019
- Tango Classico
- Ongakubatake String Quartet Collection · 2017
- Printemps
- Ongakubatake 22 the Final? (International Edition) - EP · 2019
- Le Rhone (3 Generation Version)
- Ongakubatake 22 the Final? (International Edition) - EP · 2019
- Marcy Deerfield
- Palette · 2007
- Kimagure Waltz
- Ongakubatake String Quartet Collection · 2017