When Japanese input is performed in a cellular phone, a candidate list screen in which conversion candidates according to an input characterstring of hiragana are mixed with charactertype candidates 52 and 55 designating post-conversion of the input characterstring to a specified charactertype is formed. 携帯電話で日本語入力を行う場合に、平仮名の入力文字列に応じた変換候補と、入力文字列を特定の字種に後変換する旨を指定する字種候補52,55とを混在させた候補一覧画面を作成する。 - 特許庁