Thaitsuki Nihonto Japanese Katana are specially handmade and forged in the Yamato Nihonto tradition, which is considered to be the oldest tradition in japanese sword making. This forging method plus premium quality, high-carbon Japanese steel makes it an extremely sharp, durable and one of the most flexible blades with bo-hi (groove) offered today. Each can be completely disassembled for full maintenance. These are fully functional Japanese samurai swords, not replicas.