In the "Vs Computer" or "Vs Man" modes, select the 4th option, then the 2nd option for the name entry screen. In here, enter the following Japanese characters as your name and press Run. Format is Row #, Column #. There are also alphabet letters and numbers, enter those directly.
At the password screen, enter the following Japanese characters. Format is Row #, Column #. - 7,5 - 1,3 - 1,2 - 4,2 - 6,10 - - 3,1 - 1,2 - 4,10 - 4,6 - 7,2 - 4,1 - 1,2 - - 3,5 - 1,8 - 5,1 - 6,2 - 4,5 - - 2,5 - 9,4 - 1,7 - 1,2 - 9,4 - 9,4 - 7,6 - - 6,1 - 1,2 - 2,5 - 5,5 - 4,5 - 1,5 - 9,2 -