Hiroki Kashiwagi

- Half Time
- Hats Music Collection for TV Themes · ٢٠١٩
- Today for Tomorrow
- Hats Music Collection This Is Hats · ٢٠١٧
- Reminiscence -Kaisou- (feat. Taro Hakase & Yukie Nishimura)
- Hats Music Collection Taro Hakase Collaborated Works · ٢٠١٧
- Nuovo Cinema Paradiso(カバー)
- MAJESTIC · ٢٠٢١
- The Second Star to the Right
- Hats Music Collection Cover Songs from Movies · ٢٠٠٨
- Cuckoo
- Cuckoo - Single · ١٩٩٨
- ジムノペディ第1番
- Deja vu -Cello de Cinema- · ٢٠١٠
- いつか王子様が
- Deja vu -Cello de Cinema- · ٢٠١٠
- サーカス (Silent Cello ver.)
- Deja vu -Cello de Cinema- · ٢٠١٠
- Spring Has Come
- MAJESTIC · ٢٠٢١
- Beautiful Days
- MAJESTIC · ٢٠٢١
- シリウス
- MAJESTIC · ٢٠٢١
- 雫
- MAJESTIC · ٢٠٢١