Notes: C, Db, F, G, Ab, and Bb - Key: C - Origin: Japanese - Category: Heptatonic Scales
The C Insen uses seven notes per octave. Because of this same reason it is a member of the so called Heptatonic -scales that have Seven-note (or Seven-tone). On the piano keyboard, it is made up of three black keys: Db, Ab, and Bb and three white keys: C, F, and G. This combination makes this scale - as well as the C Akebono I, C Akebono II, and C Banshikicho - as great choices for composing or improvising Japanese music.
If we take a look a the key signature of the C Insen Scale we can find it has three flats and no sharps. Therefore, on sheet music you will find three accidentals on the score. The notes of this scale are: C, Db, F, G, Ab, and Bb.