|Diary wa Fortissimo (Instrumental)|
|English Name||Fortissimo Diary|
|Album||K-ON!! Character Image Songs: Tsumugi Kotobuki|
|Performed By||Tsumugi Kotobuki|
|Release||November 17, 2010|
|Genre||J-Pop, Anime Song|
|Previous||Come with Me!! (Tsumugi Ver.)|
|Next||Yasei no Jounetsu (Instrumental)|
Diary wa Fortissimo (Instrumental) is the instrumental version of Tsumugi Kotobuki's song "Diary wa Fortissimo", produced by Pony Canyon and published on 17 November 2010 within Tsumugi's Character Image Songs album.
The song was written by Shouko Ohmori, composed by Susumu Kawaguchi and arranged by Shigeo Komori.