A peaceful piano melody that you can feel and imagine the scenery of nostalgic and beautiful Japan. Super Natural is releasing the quiet piano album, featured a pianist Hanae Sakuyama. The 6th release is the title, "Stream", which expresses the murmuring sound of the stream. The scale of the piano, which can be transformed freely, captures the movement of the murmuring water and expresses how the water drips and flows. The melody of the piano plays successfully the movement and beauty of nature.