The unique technology contained within Nintendo DS is what makes Dr. Kawashima’s Brain Training possible.

Nintendo DS has two screens - the lower of which is touch-sensitive. By holding the system sideways, like a book, users can write on the touch screen with the stylus, like a pen and paper. (Left-handed users can turn the Nintendo DS around so that the touch screen is on the left side.)

Nintendo DS also features a built-in microphone, so you can perform some of the exercises simply by speaking. Plus, Nintendo DS’ wireless communication technology allows for up to 16 people to take part in a Calculation Battle using just one copy of the game. It is also possible to send a demo version of the game to another Nintendo DS and to download additional sudoku puzzles from stores.