In Japan, sword is regulated by the Ministry of Culture. It defines that sword only made of special iron ore from certain region can be called “Japanese sword” or katana. Also, the number of sword that each sword smith can make is regulated. Considering the fact that there are less than 80 active sword smiths in Japan and that it takes at least one month to complete one sword, number of available new sword is such limited. Because of the situation mentioned above, sword smiths usually do not hold inventory at their place and they start making a new sword after receiving an order. So, if you decide to possess a sword, find a good sword smith and order a sword as soon as possible! If you want to find a good sword smith, check here.