To provide a mobile communication terminal suppressing trouble on operability when display Hiragana (Japanese syllabary characters) by inputting a sentence in Roman alphabet, in the mobile communication terminal with limited usable dial keys, and to provide a program used therefor.

The mobile communication terminal has: the dial key 110 for a telephone number disposed with "A, I, U, E, O, and N" without lapping over each other, and disposed with "K, S, T, N, H, M, Y, R, and W" without lapping over each other; and a controller for displaying Hiragana associated to depression on a display means when detecting the depression of a main input means corresponding to the Kunrei Romaji notation (Cabinet-ordered Romaji notation) from the "ka" series to the "wa" series.