Parts of a Katana
Fuchi (縁): The fuchi is a hilt collar between the tsuka and the tsuba.
Habaki (鎺): The habaki is a wedge shaped metal collar used to keep the sword from falling out of the saya and to support the fittings below; fitted at the ha-machi and mune-machi which precede the nakago.
Kaeshizuno (返し角): a hook shaped fitting used to lock the saya to the obi while drawing.
Kashira (頭): The kashira is a butt cap (or pommel) on the end of the tsuka.
Kōgai (笄): The kōgai is a spike for hair arranging carried sometimes as part of katana-koshirae in another pocket.
Koiguchi (鯉口): The koiguchi is the mouth of the saya or its fitting; traditionally made of buffalo horn.
Kojiri (鐺): The kojiri is the end of the saya or the protective fitting at the end of the saya; also traditionally made of buffalo horn.
Kozuka (小柄): The kozuka is a decorative handle fitting for the kogatana; a small utility knife fit into a pocket on the saya.
Kurigata (栗形): The kuri-kata is a knob on the side of the saya for attaching the sageo.
Mekugi (目釘): The mekugi is a small peg for securing the tsuka to the nakago.
Menuki (目貫): The menuki are ornaments on the tsuka (generally under the tsuka-ito); to fit into the palm for grip and originally meant to hide the mekugi.
Mekugi-ana (目釘穴): The mekugi-ana are the holes in the tsuka and nakago for the mekugi.
Sageo (下げ緒): The sageo is the cord used to tie saya to the belt/obi when worn.
Same-hada (鮫肌): literally the pattern of the ray skin.
Same-kawa (samegawa) (鮫皮): same-kawa is the ray or shark skin wrapping of the tsuka (handle/hilt).
Saya (鞘): The saya is a wooden scabbard for the blade; traditionally done in lacquered wood.
Seppa (切羽): The seppa are washers above and below the tsuba to tighten the fittings.
Shitodome (鵐目): an accent on the kurikata for aesthetic purposes; often done in gold-ish metal in modern reproductions.
Tsuba (鍔 or 鐔): The tsuba is a hand guard.
Tsuka (柄): The tsuka is the hilt or handle; made of wood and wrapped in samegawa.
Tsuka-maki (柄巻): the art of wrapping the tsuka, including the most common hineri maki and katate maki (battle wrap). There are also more elaborate and artistic wrapping techniques, like Jabara maki.
Tsuka-ito (柄糸): Tsuka-ito the wrap of the tsuka, traditionally silk but today most often in cotton and sometimes leather