The katana is not only a weapon but also a work of art. Craftsmen devote significant skill and attention to detail in forging and crafting the blade. The unique curvature, the pattern on the blade (hamon), and the fittings are all aspects that contribute to the katana's aesthetic appeal. It's important to note that the use of the ninja sword in contemporary times varies. While some individuals study traditional Japanese martial arts that involve the katana, others may collect them as art pieces or practice with replicas for fitness and enjoyment. Additionally, laws and regulations regarding the ownership and use of swords vary by country.