Japan has a lot of different prefectures. These prefectures are all unique in their shape, but they all eventually interlock with each other perfectly. This interlocking feature of the prefectures is the basis of the game "Statetris Japan." In this Tetris-like game, you have to move all the prefectures until they are in their natural locations. Each prefecture will come individually and you have to use the right and left arrow keys to move it around until it is where it needs to go. Then you can click the down arrow key to get it to drop faster. Good luck!