The PSR-E323/E223 digital keyboards let even beginning plays taste the joy of playing music. Since the instruments come with a range of tones and accompaniments as well as a lesson function, we devoted ourselves to creating an interface that lets the player enjoy performing without any effort. To that end, we first put ourselves in the player's position, test-playing existing keyboards exhaustively. This brought us to the realization that aspects such as switch positioning almost never lent themselves to intuitive use when seen through the eyes of a novice. Functional though these instruments were, they lacked the appeal needed to charm the player. We threw ourselves into the search for an interface that would look good and be easy to use. One of the solutions that emerged was to establish cross zones on the panel, in addition to the horizontal color divisions and partitioning characteristic to Yamaha keyboards. We then arrayed the elements of the interface according to purpose, into areas for sound and song selection, accompaniment playback, and lesson functions. For example, we placed the play / stop button for the auto-accompaniment in from of the player’s left hand, for easy operation while the right hand plays the melody. Conversely, the right side of the instrument is reserved for sound and song selection, and features lists of sounds and songs displayed where the player can see them with minimal eye movement. We also looked at the design of each and every button. Take, for example, the simple shape, reminiscent of a child’s building blocks. Adding these elements to the design gave it an endearing quality that makes you want to reach out and touch it. We also put a great deal of effort into details such as how the buttons feel to push, and curved all the surfaces that the player's fingers are likely to touch. Our goal for this design was to go beyond the exterior of the instrument, achieve an ease of use that allows anyone to enjoy playing it. I believe that is a vital aspect of product design.