A keyboard musical instrument, a method, and a non-transitory computer-readable recording medium that improve operability are provided. An electronic musical instrument comprises a keyboard including plural white keys each of which is allocated with plural characters and plural black keys, and a controller. The controller executes, in a musical sound producing mode that is set, accepting a sound producing instruction of a musical sound in response to an operation of the keyboard, and, in a symbol input mode that is set, according to both a white key designated from the plural white keys and a black key designated from the plural black keys, accepting an input of a character among the plural characters allocated to the white key designated from the plural white keys.