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Kumihimo

Kumihimo is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kumihimo rather than just read about it. In short: Kumihimo (組み紐) is a traditional Japanese artform and craftwork for making braids and cords. In the past, kumihimo decorations were used as accessories for kimono as well as samurai armor.

Kumihimo — main illustration
Kumihimo — illustration

Key takeaways

  • Kumihimo belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Kumihimo to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Kumihimo from memory before moving on to harder problems.

Reference excerpt

Kumihimo (組み紐) is a traditional Japanese artform and craftwork for making braids and cords. In the past, kumihimo decorations were used as accessories for kimono as well as samurai armor. Japanese braiding, as kumihimo is sometimes known in English, is also associated with Shinto rituals and religious services. Literally meaning "gathered threads", kumihimo are made by interlacing reels of yarn, commonly silk, with the use of traditional, specialised looms – either a marudai (丸台, lit. 'round stand') or a takadai (高台) (also known as a kōdai). There are a number of different styles of kumihimo weaving, which variously create a braided cord ranging from very flat to almost entirely rounded. Kumihimo cords are used as obijime, cords worn belted around the front of some obi when wearing kimono.

History

During the Jomon period, primitive braids appeared that could be considered the predecessors of kumihimo, or Japan's first kumihimo. During this period, braids were used to create patterns on Jomon pottery, and the indentations of the braids attached to the clay became the decoration of the pottery. Kumihimo, which falls into the category of crafts, was introduced to Japan from China via the Korean peninsula around 700 AD. When the art first arrived in Japan, it was used to decorate Buddhist scrolls and other votive items. The city of Nara emerged as a centre of cultural and artistic exchange and became the point of introductory of kumihimo to Japan. When regular trade and cultural exchange with China ceased Heian period (794-1185), kumihimo culture flourished, combining several earlier techniques to create a uniquely Japanese design that was more complex than before. From the mid-Heian period, kumihimo was also used to decorate ō-yoroi, the Japanese armour worn by samurai. In addition to functionality, the aesthetics of the ō-yoroi were considered important, and sometimes 300 meters of kumihimo were used for each piece of armor. Kumihimo was also used to tie tachi (Japanese long sword) and harnesses around the waist. From the late Heian period, nioi-odoshi (匂威) and susogo (裾濃), a weaving technique characterized by gradations of color, appeared. During the Kamakura period (1185-1333), various new weaving techniques for kumihimo appeared. Kikko-gumi (亀甲組), which imitates the pattern of a turtle shell, appeared for the first time in this period and was used as kumihimo for armor. During the Muromachi period (1333-1573), kumihimo was used as a decorative weave for teaware used in the Japanese tea ceremony. Taking advantage of the wabi-sabi aesthetic that emerged during this period, this weaving method became popular for designs that were more subdued yet prestigious than the more traditional and flamboyant designs. During this period, dan-odoshi (段威), a weaving technique using different colors in a striped pattern, appeared. During the Azuchi-Momoyama period (1568-1600), a weaving technique called mongara-odoshi (紋柄威), in which mon (family emblem) and designs were expressed in two colors, appeared.

During the Edo period (1603-1867), with the advent of a more peaceful society, the aesthetic value of Japanese swords became increasingly important. As the demand for kumihimo for Japanese swords increased, frames called takadai and naikidai were invented to make kumihimo, and the technique of braiding developed dramatically, giving rise to many new techniques. Kumihimo spread to the general public chōnin class and was used as braids and cords for attaching haori (traditional Japanese jacket), inro (traditional Japanese portable case), and netsuke. During this period, geisha began to use the otaiko-musubi (御太鼓結び) knot to tie obi (kimono belt), which spread to the general public and dramatically increased the decorative value of the obi. As a result, decorative kumihimo were used as obijime to support the obi. The technique of ayadashi (綾出), which produces patterns and characters on the kumihimo, appeared during this period, and various new methods of weaving patterns appeared along with the popularity of the iki aesthetic.

During the Meiji era (1868-1912), the demand for kumihimo to decorate Japanese swords decreased drastically due to the Sword Abolishment Edict and the disappearance of the samurai class. After that, kumihimo survived mainly as obijime to support obi. Kumihimo braids were first created by using fingerloop braiding to weave different yarns together. Later, tools such as the marudai and the takadai were developed, allowing more complex braids to be woven in a shorter amount of time.

Modern kumihimo: 20th and 21st centuries Japanese braiding is being used in other areas in addition to its traditional uses, and has been taken up by arts and craft communities outside of Japan. Kumihimo has gained in popularity outside of Japan, with an increasing number of beginner books available in languages other than Japanese. There is also a Journal of the American Kumihimo Society. In contrast to the interest in Japanese braiding as a craft for all, the city of Columbus, Georgia, USA, commissioned Junichi Arai (1932–2017) to create a permanent 12 × 9 metre metallic fibre artwork consisting of 200 stainless steel kumihimo braidings that produced kinetic waves. Arai is considered an important innovator who raised textiles from craft to art. Akiko Moriyama describes him thus: "Arai embodies everything about Japanese textiles, from the challenges to the possibilities." Arai's installation opened at for the River Center for Performing Arts in 2003. In the present day, modern variations of kumihimo weaving discs exist, typically made of firm, dense foam with (typically) 32 notches around the edge, creating the tension necessary for weaving kumihimo. These discs are considered to be a more affordable and portable alternative to a traditional marudai, with many different sizes and shapes of disc available for purchase. However, a modern foam kumihimo disc is considered less versatile than a traditional marudai. A traditional marudai allows the weaver to use as many yarns of as many thicknesses as desired, and to create braids which are flat, four sided, or hollow. A foam kumihimo disc constrains the weaver to no more than 32 yarns that must not be thicker than the notch allows, and does not enable the creation of flat braids. To make a flat braid a separate rectangular or square "disc" must be made or purchased.

… excerpt ends here. Continue reading the full article.

Illustrations

Kumihimo: Kumihimo braid
Kumihimo braid
Kumihimo: Sageo cord for tachi (Japanese long sword) made of kumihimo, with Tokugawa clan mon, Edo period
Sageo cord for tachi (Japanese long sword) made of kumihimo, with Tokugawa clan mon, Edo period
Kumihimo: Ō-yoroi decorated with kumihimo owned by Shimazu Nariakira
Ō-yoroi decorated with kumihimo owned by Shimazu Nariakira
Kumihimo: Three tachi decorated with kumihimo (sageo cords), Edo period
Three tachi decorated with kumihimo (sageo cords), Edo period
Kumihimo: A vermilion obijime tied over the kimono and obi
A vermilion obijime tied over the kimono and obi

Worked examples

Example 1 — a first encounter with Kumihimo

Start with the simplest possible case. Write down what Kumihimo claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kumihimo before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kumihimo ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kumihimo

In research
Kumihimo appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Kumihimo in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Kumihimo is common in secondary-school and first-year university syllabi. It links to neighbouring topics Braids, Decorative ropework, Japanese folk art, so understanding it makes those chapters shorter.
In everyday life
Look for Kumihimo outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Kumihimo in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Kumihimo means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Kumihimo out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kumihimo in simple terms?

Kumihimo (組み紐) is a traditional Japanese artform and craftwork for making braids and cords. In the past, kumihimo decorations were used as accessories for kimono as well as samurai armor.

Why does Kumihimo matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kumihimo?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kumihimo.

Tags

  • Braids
  • Decorative ropework
  • Japanese folk art
  • Japanese weaving techniques
  • Japanese words and phrases
  • Ropework

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