Play along 知らないんでしょ?, chord by chord.

Chords of: 知らないんでしょ? by: Ken Hirai. (Abmaj7, G, Gm7, Fm7) are the main chords of the song. The chords are displayed instantly in real-time with a YouTube player, four synced views, instrument diagrams, loop practice and a built-in vocal-remover mixer.