Japanese yen banknotes are designed to withstand folding without tearing or creasing, as they are made of a durable polymer material. However, it is important to handle yen notes with care and avoid excessive folding or crumpling due to cultural considerations and practical concerns such as ink fading. Alternative ways to store yen bills include using a billfold or wallet specifically designed for yen notes or using a money clip or rubber band. Yen notes can be folded in half horizontally or into thirds for convenience. Japanese money also features unique serial numbers and hidden images and symbols. It is important to take care of yen notes by avoiding extreme temperatures or moisture and gently cleaning them if necessary.