Kumihimo (組み紐) is a Japanese form of braid-making. Cords and ribbons are made by interlacing strands. Kumi himo is Japanese for "gathered threads". The name, Kumihimo also applies to the braids, cords and ribbons that are the product of the braiding-technique.
Kumihimo cord was first created by a form of finger-loop braiding. Later tools such as the marudai and the takadai were employed to make more complex braids in shorter time. The most prominent historical use of the cords was by samurai as both a functional and decorative way to lace their lamellar armour and their horses' armor (barding). Kumihimo cords are now used as ties on haori jackets and obijime, which are used for tying on an obi (kimono sash).
A modern kumihimo disc made of firm but flexible foam plastic with notches can also be used as a portable marudai. The discs have 32 notches that create the tension that is usually created by tama on a marudai. The discs are convenient but are not as versatile as the marudai. On a marudai, any thickness or amount of string can be used, but on a disc only 32 or fewer strand braids can be made from thin cord. Also, marudai can make many types of braids, such as flat, four sided, and hollow. There are also rectangular foam cards, especially suitable for making flat braids.
The foam kumihimo disc is lightweight, portable, and significantly more affordable than the traditional marudai. Braiders can create complex braids up to 24 bobbins and incorporate beads. There are many sizes and shapes of foam discs available. Look for a disc that is sturdy and doesn't bend easily, otherwise the braider will experience uneven tension.
- Kagami – the top braiding surface on a marudai; Japanese for "mirror".
- Kongō Gumi – a class of patterns for round cord all involving eight threads folded in half for a total of sixteen strands. In clockwise order, each bobbin is moved to the opposite side. When different combinations of thread color are used, many interesting patterns emerge, including diagonal stripes, diamonds on a background, triangles resembling hearts, and tiny six-petalled flowers.
- Marudai or maru dai – the frame for the braiding; "maru dai" Japanese for "round stand".
- Mizuhiki, decorative cords wrapped-around such things as Shūgi-bukuro envelopes.
- Obi – the broad cloth sash used in traditional dress; a kumihimo belt, called the obijime, is tied around the obi.
- Obijime – the cord used to bind the obi securely.
- Takadai – a takadai is a large, rectangular frame for creating flat, oblique kumihimo braids.
- Tama – bobbins. The thread is kept from unwinding by passing the thread under itself, forming a loop around the tama. True silk is a hollow fiber with a rough surface that resists slipping past the loop unless gently pulled. For synthetic fibers, a flexible plastic "clamshell" bobbin may be preferable.