Yes, a wooden katana can be considered a weapon. While it may not have the same cutting or piercing capabilities as a traditional steel katana, a wooden katana can still be used for training purposes in martial arts such as kendo or iaido. It is designed to simulate the weight and handling characteristics of a real sword while minimizing the risk of injury during practice. However, it's important to note that the use of any object, including a wooden katana, as a weapon can be dangerous and should be done responsibly under proper supervision and training.