Charcoal Filter (チャコールフィルター), also known as Charcofil or Chakofiru (チャコフィル) to their fans, is a Japanese male rock band.
They are known for creating the song "Tightrope", used as the ending theme of the anime series Gensōmaden Saiyūki, back in 2000.
The next year they created the song Tightrope, used as the ending theme of the anime series Gensōmaden Saiyūki.
Following this single, the album MADE IN Hi-High took the sixth place in weekly Oricon chart, as obtained them a reputation.
Also, Konagawa and Otsuka appeared at well-known Japanese musical event Dream Power John Lennon Super Live back in 2003.