science

Kiseru

Kiseru 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 Kiseru rather than just read about it. In short: A kiseru (煙管; [ki̥seɾɯ]) is a Japanese smoking pipe, traditionally used for smoking kizami, a finely shredded tobacco product resembling hair. History The word kiseru is said to have originated from the Portuguese que sorver ("which is drawn").

Key takeaways

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

Reference excerpt

A kiseru (煙管; [ki̥seɾɯ]) is a Japanese smoking pipe, traditionally used for smoking kizami, a finely shredded tobacco product resembling hair.

History The word kiseru is said to have originated from the Portuguese que sorver ("which is drawn"). It is believed that pipe smoking was introduced to Japanese high society, such as the samurai, the Buddhist priest classes and rich merchants. Tobacco has been known in Japan since the 1570s at the earliest. By the early 17th century, kiseru had become popular enough to even be mentioned in some Buddhist textbooks for children. The kiseru evolved along with the equipment and use of incense associated with the Japanese incense ceremony, kōdō:

The kō-bon, an incense tray, became the tabako-bon, a tobacco tray. The kōro, an incense burner, became the hi-ire, a tobacco embers pot. The incense pot became the hai-otoshi or hai-fuki, a jar to contain the ash. During the Edo period, many samurai and chōnin smoked tobacco, and often carried a kiseru in a special case called a kiseruzutsu. Kiseru were considered status symbols for their owners, due to being made from precious metals and having intricate designs adorned on them. There was also a high cost on importing tobacco, which was considered an extravagance of the rich. The kiseru would be the main way to smoke tobacco until after the Meiji Restoration of 1868, when cigarettes were introduced and rapidly became popular. However, kiseru would remain popular in rural areas and among people wishing to preserve its culture. By 1929, there were 190 workshops and 400 artisans producing kiseru in Japan. Nowadays, there are only a few artisans left still making kiseru. However, there remains some interest in kiseru and its aesthetics among the youth. The word kiseru today is more commonly used to refer to the practice of defrauding the railway system by buying two cheap tickets to get past the entrance and exit gates while not paying for the distance between them. This is likened to a kiseru as there is only metal at the ends, and nothing in the middle, a metaphor indicating that money (metal) only covers the beginning and end.

Construction

There are two main types of kiseru: rau kiseru, which are made of three parts; the mouthpiece (吸口, suikuchi), stem (羅宇, rau), and shank (雁首, gankubi), and nobe kiseru, which are made with a single piece of metal. Metal such as brass or silver is beaten to shape the mouthpiece and bowl, then the sides are joined with silver solder. The mouthpiece and bowl are often engraved with intricate and decorative designs.

Kiseru as a weapon The length of a typical kiseru usually measured between 6 and 10 inches (15 and 25 cm), and their metal ends made them suitable impromptu self-defence weapons in emergencies. Much heavier and longer kiseru were often carried by common people living on the fringes of society, such as the yakuza, gamblers, and gangsters, which were designed to be used as weapons. These pipes were called kenka kiseru (喧嘩煙管; fighting pipes), ranging anywhere from 12 to 18 inches (30 to 46 cm). These pipes were often made of cast iron or brass, making them effective truncheon-like weapons for striking opponents. The samurai were also known to use kiseru as weapons, often for rare occasions when a samurai would be parted with his swords but still required a means of self-defence. Like the kenka kiseru, they were made completely from cast iron or brass and were called buyōkiseru. A typical buyōkiseru was about 16 inches (41 cm) long, and could be easily carried in an obi without raising suspicion. Because kiseru were so often used as weapons during the Edo period, several classical martial arts schools incorporated secret techniques into their curricula. A style of fighting armed with a kiseru was commonly referred to as kiseru-jutsu, and used similar techniques to those used in tessenjutsu.

Illustrations

Worked examples

Example 1 — a first encounter with Kiseru

Start with the simplest possible case. Write down what Kiseru 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 Kiseru 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 Kiseru 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 Kiseru

In research: Kiseru 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 Kiseru 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: Kiseru is common in secondary-school and first-year university syllabi. It links to neighbouring topics Culture of Japan, Improvised weapons, Japanese inventions, so understanding it makes those chapters shorter.
In everyday life: Look for Kiseru 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 Kiseru in 20 minutes

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

Frequently asked questions

What is Kiseru in simple terms?

A kiseru (煙管; [ki̥seɾɯ]) is a Japanese smoking pipe, traditionally used for smoking kizami, a finely shredded tobacco product resembling hair. History The word kiseru is said to have originated from the Portuguese que sorver ("which is drawn").

Why does Kiseru 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 Kiseru?

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 Kiseru.