The shamisen is similar in length to a guitar, but its neck is much slimmer and without frets. Its drum-like rounded rectangular body, known as the dō, is covered front and back with skin in the manner of a banjo, and amplifies the sound of the strings. The skin is usually from a dog or cat, but in the past a special type of paper was used and recently various types of plastics are being tried. On the skin of some of the best shamisen, the position of the cat's nipples can still be seen.
The three strings are traditionally made of silk, or, more recently, nylon. The lowest passes over a small hump at the "nut" end so that it buzzes, creating a characteristic sound known as sawari (somewhat reminiscent of the "buzzing" of a sitar, which is called jawari). The upper part of the dō is almost always protected by a cover known as a dō kake, and players often wear a little band of cloth on their left hand to facilitate sliding up and down the neck. This band is known as a yubikake. There may also be a cover on the head of the instrument, known as a tenjin.
In most genres the shamisen is played with a large weighted plectrum called a bachi, which was traditionally made with ivory or tortoise shell but which now is usually wooden, and which is in the shape likened to a ginkgo leaf. The sound of a shamisen is similar in some respects to that of the American banjo, in that the drum-like skin-covered body, known as a dō, amplifies the sound of the strings. As in the clawhammer style of American banjo playing, the bachi is often used to strike both string and skin, creating a highly percussive sound.
