Japanese puzzle boxes are handmade with superb quality. There is only one combination to open each box. Sides of the box move or slide to allow other pieces to move as well. These actions, performed in the right combination will open the lid. These beautiful boxes are perfect for gifts or wonderful as a conversation piece or keepsake. The "sun" in the name is a Japanese form of measurement. Each "sun" is approx. 1.2 inches in box length. The more steps in the name - the harder it is to open the box. The last part of the title is the name of the pattern displayed on the box. This 5 sun box takes 35 steps to open. There is an extra step to open a hidden compartment that holds a coin.