The characters are in Japanese, so I'll just say on what position each character is in.
Right 1 time, Down 1 time and chose the character. Right 6 times, Up 1 time and chose the character. Left 5 times, Down 1 time and chose the character. Up 1 time, Right 6 times and chose the character. Left 4 times, Down 1 time and chose the character. Up 1 time, Right 4 times and chose the character. Left 7 times, Down 2 times and chose the character. Up 2 times, Right 7 times and chose the character. Left 2 times, Down 1 time and chose the character. Left 6 times, Down 7 times and chose the character. Up 6 times, Right 2 times and chose the character. Left 2 times, Up 1 time and chose the character. Right 1 time, Up 1 time and chose the character. Down 3 times, Left 1 time and chose the character. Right 1 time, Up 3 times and chose the character. Down 4 times, Left 1 time and chose the character. If done right, you'll open up the 16th Map shaped like a Z.