1 Tools explanation: Saw

It is well known that saws are tools used when cutting trees. It is the most commonly used tool along with a chisel (flea) and plane (canna) among carpenter tools.

The saw is made of a steel saw body and a wooden handle. The part with a saw body and teeth is called "saw teeth", and the side without it is called "back". The part close to the handle is called "original body (body)" and the tip is called "finder body". In general, the saw body has a thicker center waist than the saw teeth and the back part, and the end body is thinner and wider, increasing the thickness and narrower as it approaches the body. This gives a uniform strength to the entire saw body. In addition, the saws in Japan are generally made to cut when pulled. Looking around the world's carpentry tools, saws are pressed in most countries, so our saws are very rare.

The saw is also known as a variety of tools. First, it is broadly divided into a "vertical saw" that grinds in the direction of wood fiber, and a "horizontal saw" that grinds at right angles from the direction of the fiber (see the explanation below). Since the Edo period, when occupations were different, various dedicated saws were born according to the application. For vertical grinding, there are Gaga-ri and Kamoi saw saws, and for horizontal grinding, there are hole saws (nasal saws), saws with torso, saw saws with saws, and saws. In addition, saws with both vertical and horizontal eyes on both sides of saws that are often seen are called double-edged saws, and began to be used around 1897.

The saw is cut out from the steel plate, heat treatment, and then beat with a hammer to make it. Before the steel plate became easy to obtain, it was made by training from tamagane, but it is said that it had a hard time making it uniform steel saws.