To enable even a beginner, who has just begun to learn playing a keyboard instrument, to easily play it or train himself/herself for playing it by reducing the number of keys, by arranging each key correspondingly to each finger of a hand or both hands.
A left hand playing part 11 is composed of keys 11a-11e, and a right hand playing part 12 is composed of 12a-12e. And these individual keys 11a-11e, 12a-12e are arranged so that a player can press the keys with fingers as those on an ordinary keyboard instrument. Here, each of the keys 11a-11e composing the left hand playing part 11 is arranged correspondingly to each left finger, and each of the keys 12a-12e composing the right hand playing part 12 is arranged correspondingly to each right finger, respectively. Moreover, a left hand fingering display part 13 and a right hand fingering display part 14 are provided with five pieces of LEDs (an emitting part), respectively. Each LED is arranged at a position corresponding to each key. And the LEDs are arranged so as to be able to display any of the keys to the player by lighting up any of the LEDs.
KAWAMURA KIYOSHI
KAWABATA TARO
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