1. A character input device comprising a display unit having a display screen simultaneously displaying, when characters of hiragana 50-character Japanese language phonetic syllabary or alphanumeric characters are divided into a plurality of groups comprising columns and rows, characters of at least two columns spanning from at least two lines on a character input region provided on said display screen, a first group of two input keys and a second group of two input keys, and a display control unit displaying, in an identifiable manner, at least one selected character among the characters displayed on the character input region, said display control unit sequentially changing at least one character which is to be focused so as to be identifiable by scrolling at least two lines of characters in accordance with an operation of said first group of two input keys, said at least two lines of characters being displayed simultaneously; and changing the character, which is being focused so as to be identifiable, with another character belonging to the same row as that character in accordance with operation of said second group of two input keys.
1. A character input device comprising a display unit having a display screen simultaneously displaying, when characters of hiragana 50-character Japanese language phonetic syllabary or alphanumeric characters are divided into a plurality of groups comprising columns and rows, characters of at least two columns spanning from at least two lines on a character input region provided on said display screen, a first group of two input keys and a second group of two input keys, and a display control unit displaying, in an identifiable manner, at least one selected character among the characters displayed on the character input region, said display control unit sequentially changing at least one character which is to be focused so as to be identifiable by scrolling at least two lines of characters in accordance with an operation of said first group of two input keys, said at least two lines of characters being displayed simultaneously; and changing the character, which is being focused so as to be identifiable, with another character belonging to the same row as that character in accordance with operation of said second group of two input keys. 4. A character input device as set forth in claim 1 , wherein said second group of two input keys are comprised of a pair of keys and said display control unit replaces the currently identifiably displayed character or characters displayed in the same row or column as said character with other characters belonging to the same group as said character when one input key of said second group of two input keys is operated, displays the head character of said group when said one input key is operated after the last character of the characters belonging to that group is displayed, replaces the currently identifiably displayed character or characters displayed in the same row or column as said character with other characters belonging to the same group as said character when the other input key of said second group of two input keys is operated, and replaces the displayed character with the last character of said group when said other input key is operated after the head character of the characters belonging to that group is displayed.