(Stay still! - You can forget the two words when you play this puzzle.)
This puzzle was designed at the request of the teacher who teaches in the special school for the visually impaired.
The existing puzzle usually doesn't have a frame on the border between prefectures and it allows pieces to be movable on the board. The frames prevent pieces from moving once they are placed and enable especially the people who have visual impairments enjoy playing the map puzzle without being bothered by movable pieces.