Hiroki Kashiwagi

- Half Time
- Hats Music Collection for TV Themes · 2019
- Today for Tomorrow
- Hats Music Collection This Is Hats · 2017
- Reminiscence -Kaisou- (feat. Taro Hakase & Yukie Nishimura)
- Hats Music Collection Taro Hakase Collaborated Works · 2017
- Nuovo Cinema Paradiso(カバー)
- MAJESTIC · 2021
- The Second Star to the Right
- Hats Music Collection Cover Songs from Movies · 2008
- Cuckoo
- Cuckoo - Single · 1998
- ジムノペディ第1番
- Deja vu -Cello de Cinema- · 2010
- いつか王子様が
- Deja vu -Cello de Cinema- · 2010
- サーカス (Silent Cello ver.)
- Deja vu -Cello de Cinema- · 2010
- Spring Has Come
- MAJESTIC · 2021
- Beautiful Days
- MAJESTIC · 2021
- シリウス
- MAJESTIC · 2021
- 雫
- MAJESTIC · 2021