Kizu is the evidence of repeated forging The Japanese sword is primarily composed of tamahagane (steel made from iron or black sand). As it is forged repeatedly, there are cases where impurities are not completely removed or small mistakes during the forging and tempering process can cause kizu (flaws) in Read More
The ‘hi’ is the Japanese name for the groove (also known as a fuller) that runs up the length of the blade. Its original purpose was to make the sword lighter and more resistant to bending. As time went on, decorative factors as well as practical ones were added as Read More
Even those seeing a Japanese sword for the first time are captivated by the vividness of the hamon (blade pattern). The hamon refers to the part that is tempered with extra heat, so it is actual proof that the sword went through the tempering process. The swordsmiths could simply stretch Read More
The blade of the Japanese sword is made by heating the tamahagane (steel for making swords) to high temperature then hitting it flat with a mallet. They use a chisel to create the rift in the blades, fold it, then hit it again with a mallet. This process is repeated Read More
Sori – the curve that captures the charpness and beauty of the Japanese sword As mentioned in one of our previous articles about Japanese sword craftsmanship, the katana was originally preceded a straight sword with no curve at all; known by many names including the apt ‘chokuto’ – literally ‘straight Read More
The sharp point of a Japanese katana is called the “kissaki”. It is sometimes also called the “boshi” – hat, but boshi can refer to the kissaki itself or the hamon (temper pattern) that spills onto the kissaki. Kissaki is used more often to avoid this confusion, it is also Read More
Japanese has a word “tsukuri-komi” which refers to the structure and style of the sword blade. In a previous article about the sword’s appearance, I mentioned that the tachi had a strong back-bend whereas the uchigatana had a strong bend at the edge. The angle of the bend, the thickness Read More
The Japanese sword is praised as “beauty in use”. Its appearance is so simple with no unnecessary features, but in fact it has many skills woven into one piece of work. When we look at those details, we are drawn further into the charm of the Japanese sword as we Read More
