Choose CONTINUE on the title screen & enter these hiragana letters:
"shi" (6x), "ze" (2x), "nu" (2x), "wa" (16x), "a" (5x).
Incase you don't know Japanese letters: (I assume all the counts start from the upper left as 1st column & 1st row)
shi: column 2, row 3
ze: column 9, row 4
nu: column 3, row 5
wa: column 9, row 1
a: column 1, row 1
