KEY INPUT DEVICE FOR REMOTE CONTROL APPARATUS, KEY INPUT METHOD OF KEY INPUT DEVICE FOR REMOTE CONTROL APPARATUS, PROGRAM, AND RECORDING MEDIUM

A first control unit outputs, to a lighting control unit, a lighting signal that causes a plurality of light-emitting units provided for each of a plurality of keys for operating to be sequentially lighted for each of groups determined in advance. Based on a signal for selecting a group outputted from a first selection unit and an output signal from the first control unit, a first comparison/judgment unit outputs a group whose light-emitting unit had been lighted upon selection as a finalized group. A second control unit outputs a lighting signal that causes light-emitting units included in the finalized group to be respectively sequentially lighted, and based on the output signal and a signal for selecting a key outputted from a second selection unit, a second comparison/judgment unit judges that a key corresponding to a light-emitting unit that had been lighted upon selection as a finalized key.