The short answer: four groups — neck, body, strings, accessories
The shamisen has many part names, but they fall into four groups: the sao (neck), do (body), ito (strings) and accessories. In short: the sao is the neck that sets the pitch, the do is the body that resonates, the ito are the strings that make the sound, and pieces like the koma and bachi support and sound them.
Knowing the names and roles makes life easier when you replace strings or a bridge, when you tune or maintain the instrument, and when you ask a shop for help. This guide organises the main parts of the shamisen clearly for beginners.
Around the neck (sao)
The sao is the long, thin part you press with your left hand to set the pitch — the equivalent of a guitar neck. The thickness of the sao is what divides the shamisen into genres.
Tenjin (head)
The very top of the neck, where the tuning pegs sit — the “head” of the shamisen. Three itomaki are fitted here.
Itomaki (tuning pegs)
The three pegs set into the tenjin. Turning them adjusts string tension and therefore pitch. They are the heart of tuning, and also where trouble — slipping or sticking pegs — tends to occur.
Kamigoma and sawari
A small part near the tenjin that supports the strings. The shamisen’s distinctive lingering buzz — the sawari — is created when the first string lightly touches this area. Adjusting the sawari is essential to the instrument’s tone.
Around the body (do)
The do is the square, box-shaped part below the neck — the equivalent of a guitar body. This is where the sound resonates and is amplified.
Kawa (skin)
The membrane stretched over the front and back of the body. It receives the vibration of the struck string and makes it ring — the core of the tone. It comes in natural hide and synthetic types, each with different characteristics. The skin is delicate and vulnerable to impact and dryness.
Koma (bridge)
A small piece set on the skin to support the strings. It transmits the strings’ vibration to the skin, and its material and height change the tone. It is also a consumable.
Neo and nakagi
The part that anchors the lower ends of the strings, and the part that joins the neck to the body. You rarely think about them day to day, but they matter when assembling the instrument.
The strings (ito) and how they are sounded
The three strings are named, from thickest to thinnest, the ichi-no-ito (first string), ni-no-ito (second) and san-no-ito (third). The thicker the string, the lower the pitch. They are struck with the bachi, a large plectrum held in the right hand, whose weight and shape strongly affect both tone and playing feel.
Once you can name the parts, the rest of shamisen ownership — choosing strings and bridges, tuning, and basic care — becomes much easier to follow.