The portable electronic device includes an operation unit, a storage unit, a setting unit, and a control unit. The operation unit inputs characters. The storage unit stores a first conversion table and a second conversion table different from the first conversion table. The second conversion table is different from the first conversion table. The setting unit sets a first mode and a second mode. In a case in which the first mode has been set by the setting unit, the control unit refers to the first conversion table when characters input by way of an operation of the operation unit are converted into another type of characters or character set. In a case in which the second mode has been set by the setting unit, the control unit refers to the second conversion table when characters input by way of an operation of the operation unit are converted into another type of characters or character set.