This piano collection consists of seven pieces. All pieces were composed in a period from 1937 to 1940 and were kept playing after the Pacific War. All the seven pieces are included in the publication “The Collection of piano works by Yasuji Kiyose” and “The world music collection, instrumental music section, Vol. 33”.

Musical structure of these pieces shows Kiyose’s way of composing into practice. According to Kiyose, the first piece of the collection was written with ‘Zigeuner scale’ which is characterized by its tendency to be chromatic scale with augmented interval. The second piece of the collection has a musical pattern with long phrase which changes itself variously. This piece proceeds its music by developing tonal range and harmony. Fundamental tones consisting the third piece are the following four: C, E, G, and A. The attempt to make variegated music by using fewer type of tones, is reflected in this piece. The fourth piece of the collections was composed with the Lydian mode and it ends in lyrical mood. In the fifth piece, an interval of seventh rings remarkably. The sixth piece is a barcarole in six-eight time and it flickers duplets and dotted notes. In the last piece of the collection, interval of seventh and chromatic scale appears frequently, and rich sound spreads in the space.