In the anime series Demon Slayer, the katana is the weapon of choice of the main character, Tanjiro. These powerful swords are capable of killing demons, but they are also used for other purposes, such as cutting wood or slicing rope. The katana are incredibly sharp and durable, making them the perfect weapon for slaying demons. However, they do not have only advantages. For example, katana are very difficult to repair if they are damaged in battle. Moreover, katana require a lot of skill and training to be used effectively. Nevertheless, the katana remains the weapon of choice for demon killers because of its deadly effectiveness.