A display unit displays symbols in a plurality of columns, and in particular arranges the symbols in the same order in two or more of the columns. A game controller unit determines an arrangement of symbols at random on a condition that symbols are arranged in the same order and at the same positions in the two or more columns. A display controller unit causes the display unit to spin the two or more columns of symbols from the same position in synchronization with each other, and stop the two or more columns at the same position to display the arrangement of symbols determined by the game controller unit.