Obi (sash)

An is a belt of varying size and shape worn with both traditional Japanese clothing and uniforms for Japanese martial arts styles. Originating as a simple thin belt in Heian period Japan, the developed over time into a belt with a number of different varieties, with a number of different sizes and proportions, lengths, and methods of tying. The, which once did not differ significantly in appearance between men and women, also developed into a greater variety of styles for women than for men.
Despite the kimono having been at one point and continuing to appear to be held shut by the, many modern are too wide and stiff to function in this way, with a series of ties known as, worn underneath the, used to keep the kimono closed instead.
are categorised by their design, formality, material, and use, and can be made of a number of types of fabric, with heavy brocade weaves worn for formal occasions, and some lightweight silk worn for informal occasions. are also made from materials other than silk, such as cotton, hemp and polyester, though silk are considered a necessity for formal occasions. In the modern day, pre-tied, known as or, are also worn, and do not appear any different to a regular when worn.
Though can be inexpensive when bought second-hand, they typically cost more than a kimono, particularly when purchased brand-new. A number of specialist fabrics used particularly to make are highly prized for their craftsmanship and reputation of quality, such as, produced in the Nishijin district of Kyoto, and produced in Fukuoka prefecture.

History

Heian period to Edo period

In its early days, the was a cord or ribbon-like sash, approximately in width. Men's and women's were similar. At the beginning of the 17th century, both women and men wore a thin, ribbon-like. By the 1680s, the width of women's had already doubled from its original size. In the 1730s women's were about wide, and at the turn of the 19th century were as wide as. At that time, separate ties and cords were necessary to hold the in place. Men's were widest in the 1730s, at about.
Before the Edo period, robes were fastened with a narrow sash at the hips. The mode of attaching the sleeve widely to the torso part of the garment would have prevented the use of wider. When the sleeves of the began to grow in both horizontal width and vertical length at the beginning of the Edo period, the widened as well. There were two reasons for this: firstly, to maintain the aesthetic balance of the outfit, the longer sleeves needed a wider sash to accompany them; secondly, unlike today married women also wore long-sleeved kimono in the 1770s. The use of long sleeves without leaving the underarm open would have hindered movements greatly. These underarm openings in turn made room for even wider.
Originally, all were tied in the front. Later, fashion began to affect the position of the knot, and could be tied to the side or to the back. As grew wider the knots grew bigger, and it became cumbersome to tie the in the front. By the end of the 17th century were mostly tied in the back. However, the custom did not become firmly established before the beginning of the 20th century.
At the end of the 18th century, it was fashionable for a woman's to have overly long hems that were allowed to trail behind when in house. For moving outside, the excess cloth was tied up beneath the with a wide cloth ribbon called. Contemporary women's kimono are made similarly over-long, but the hems are not allowed to trail; the excess cloth is tied up to hips, forming a fold called the. are still used, but only as a decorative accessory.

Modern day

The most formal women's, the, is technically obsolete, worn only by some brides, with a modified, longer version – the – worn by, in the present day. The lighter has taken the place of. The originally-everyday is the most common used today, and fancy may even be accepted as a part of a semi-ceremonial outfit.
The use of fancy, decorative knots has also narrowed, though mainly through the drop in the numbers of women wearing kimono on a regular basis, with most women tying their in the style., also known as, have gained popularity as pre-tied belts accessible to those with mobility issues or a lack of knowledge on how to wear.
Tatsumura Textile located in Nishijin in Kyoto is a centre of manufacture today. Founded by Heizo Tatsumura I in the 19th century, it is renowned for making some of the most luxurious available. Amongst Tatsumura's students studying design was the later-painter Inshō Dōmoto.
The technique, traditionally produced in the Nishijin area of Kyoto, is intricately woven and can have a three dimensional effect, costing up to 1 million yen.
The Kimono Institute was founded by Kazuko Hattori in the 20th century and teaches how to tie an and wear it properly.

Women's

There are many types of for women, with certain types of worn only with certain types of kimono to certain occasions. Often, the can adjust the formality of the entire kimono outfit, with the same kimono being worn to occasions of differing formality depending on the worn with it. Most women's no longer keep the kimono closed, owing to their stiffness and width, and a number of ties worn under the keep the kimono in place.
A woman's formal can be wide and more than long, with the longest variety – the, nearing in length – worn only by in some regions of Japan. Some women's are folded in two width-wise when worn, to a width of about to ; the full width of the is present only in the knot at the back of the kimono, with the band around the middle appearing to be half-width when worn.
There are a number of different ways to tie an, and different knots are suited to different occasions and different kimono. The itself often requires the use of stiffeners and cords for definition of shape and decoration, and some knots, such as the, require additional accessories in order to keep their shape.

Women's types

are very long worn by in some regions of Japan. A 's features the crest of the geisha house she is affiliated with at the end of the, below the . are roughly long, but in some cases can be as long as long.
are slightly less formal than, despite being functionally the most formal variety of worn today. are made from either a single double-width length of fabric with a seam down one edge, or from two lengths of fabric sewn together down each edge; for made from two lengths of fabric, the fabric used for the backside may be cheaper and appear to be more plain. are made in roughly three subtypes. The most formal and expensive of these is patterned brocade on both sides. The second type is two-thirds patterned, the so-called "60% ", and is somewhat cheaper and lighter than the first type. The third type has patterns only in the parts that will be prominent when the is worn in the common style. are roughly wide and to long.When worn, a is nearly impossible to tell from a.
or is an that has been sewn in two only where the knot would begin. The part wound around the body is folded when put on. The is intended for making the more formal, two-layer variation of the, known as the. It is about long.
is a collective name for informal half-width. are to wide and roughly long.
* are a type of thin and informal worn with a or a lower-formality. are very popular, as they are easy to wear, relatively cheap, and often come in a variety of colourful designs. For use with, reversible are popular: they can be folded and twisted in several ways to create colour effects. A is wide and to long. Tying it is relatively easy, and does not require pads or strings. The knots used for are often simplified versions of. As it is easy to tie and less formal, the is sometimes worn in self-invented styles, often with decorative ribbons and accessories.
* is an unlined roughly to wide and roughly long.
or is an informal that has sides of different colours. Having been historically popular, the is frequently seen in woodblock prints and photographs from the Edo and Meiji periods, and most are vintage or antique pieces; they are not as frequently made or worn today. typically have a dark, sparingly decorated underside and a more colourful, decorated topside; the underside is commonly plain black satin silk with no decoration, though with decoration on both sides do exist. are frequently not lined, making them relatively floppy, soft and easy to tie. They are about wide and to long.
are very informal made of soft, thin cloth, often dyed with. Their traditional use was as an informal for children and men, and though historically would have been inappropriate for women to wear, the is now also worn by young girls and women with modern, informal kimono and. An adult's is roughly the same size of any other adult, about to wide and about long.
are made from cloth stiff enough that the does not need a lining or a sewn-in stiffener. One well-known type of is the, which consists of thick weft thread interwoven with thin warp thread with a stiff, tight weave; made from this material are also called. A can be worn with everyday kimono or. A is to wide or wide and about long.
was invented in the 1970s in Nishijin, Kyoto. It lies between the and the in terms of formality and use, and can be used to smarten up an everyday outfit. A is structured like a but is as short as a. It thus can also be turned inside out for wear like reversible. A is about wide and long.
is the most formal type of women's, though all but obsolete today. It is made from cloth about 68 cm wide and is folded around a double lining and sewn together. were at their most popular during the Taishō and Meiji periods. Their bulk and weight make difficult to tie by oneself, and are worn only by and brides in the present day. A is about to wide and to long, fully patterned and is often embroidered with metal-coated yarn and foilwork.
is the style of front-tied, flat worn historically by some , and now worn by courtesan-reenactors and kabuki actors on stage. are thickly padded and commonly feature large-scale, heavily decorated and sometimes three-dimensional motifs such as butterflies, clouds and Chinese dragons, typically on a background of satin silk.
– also called – is the most-used type today. A is distinguished by its structure: one end is folded and sewn in half, the other end is of full width. This is to make putting the on easier. A can be partly- or fully-patterned. It is normally worn only in the style, and many are designed so that they have patterns only in the part that will be most prominent in the knot. are shorter than other types, about to long, but of the same width, about.The is relatively new, developed by a seamstress living in Nagoya at the end of the 1920s. The new, easy-to-use gained popularity among Tokyo's geisha, from whom it then was adopted by fashionable city women for their everyday wear.The formality of a depends on its material, just as with other types. Since the was originally used as everyday wear, it cannot be worn to very formal occasions, but a made from heavy brocade is considered acceptable as semi-ceremonial wear.The term can also refer to another with the same name, used centuries ago. This was cord-like.
is a name for used in dance acts. An is typically simply patterned with large, obvious motifs, commonly woven in gold or silver metallic threads, so as to be easily visible from the audience. can be to wide and to long. As the term is not established, it can refer to any meant for dance acts, though is generally understood to refer to with large and simplistic metallic designs.
are a style of made by using strips of old cloth, woven into a narrow, striped fabric. The warp yarn is typically an actual yarn, whereas the strips of recycled cloth as used as the weft; though narrow, may require cloth the equivalent of three kimonos' worth to create. Historically woven at home out of necessity, are informal, and are generally not worn outside the house. A is similar to a in size, and though informal, is prized as an example of rural craftsmanship.
resemble, but are considered to be more formal. They are usually wider and made from fancier cloth more suitable for celebration. The patterns usually include auspicious, celebratory motifs. A is about wide and to long.
or or refers to any ready-tied, regardless of the knot the has been sewn into. It often has a separate, internally-stiffened knot piece, and a piece that is wrapped around the waist. The is fastened in place by ribbons attached to each piece. are most commonly informal styles of, though more formal pre-tied do exist, as they are indistinguishable from a regular when worn.