science

Teru teru bōzu

Teru teru bōzu 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 Teru teru bōzu rather than just read about it. In short: A teru teru bōzu (Japanese: てるてる坊主 or 照る照る坊主; lit. 'shine, shine monk') is a small traditional handmade doll hung outside doors and windows in Japan in hope of sunny weather. Made from tissue paper or cloth, teru teru bōzu charms are usually white, ghost-like figures with strings tied around their necks.

Key takeaways

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

Reference excerpt

A teru teru bōzu (Japanese: てるてる坊主 or 照る照る坊主; lit. 'shine, shine monk') is a small traditional handmade doll hung outside doors and windows in Japan in hope of sunny weather. Made from tissue paper or cloth, teru teru bōzu charms are usually white, ghost-like figures with strings tied around their necks. The words teru (照る) meaning 'to shine' and bōzu (坊主) referring to a Buddhist monk, the doll is said to represent a monk's bald head, which would shine during sunny weather. The doll therefore calls to a monk's magical powers to stop or prevent rain. Traditionally, if the weather does turn out well, a libation of holy sake is poured over them, and they are washed away in the river. In particular, teru teru bōzu charms are popular among Japanese children, who are introduced to the charms in kindergarten or daycare through a famous warabe uta (nursery rhyme) released in 1921. The song calls teru teru bōzu to bring back the sunny days, promising lots of sake if the wish is fulfilled, but decapitation if not. The nursery rhyme is usually sung by children as they make the doll. Teru teru bōzu became popular during the Edo period among urban dwellers, whose children would make them the day before the good weather was desired and chant, "Fine-weather priest, please let the weather be good tomorrow."

History The tradition of weather-watchers and a rich folk culture of hiyorimi (日和見) can be traced with certainty to the Heian period (749–1185) continuing through the Edo period (1603–1867). Teru teru bōzu weather-watching practice tradition originated and was adapted from a Chinese practice during the Heian period. The practice, called Saoqing Niang (掃晴娘) in China, involved putting the teru teru bōzu on the end of a broom to sweep good spirits your way, and rather than bōzu being a monk, but a young girl with a broom. As the story unfolds, a girl was sacrificed to save the city during a heavy rainfall by ascending symbolically to the heavens and sweeping rain clouds from the sky. Since then, the people have commemorated her by making paper cutouts of her and hanging them outdoors in the hopes of good weather. Teru teru bōzu as a Japanese practice seems to have originated from the similarity between origami dolls and names described in the literature in the middle of the Edo period. A reference to teru teru bōzu is written in Kiyū Shōran (嬉遊笑覧) by Nobuyo Kitamura, a scholar of Japanese classical literature in 1830. It is written, "If the weather becomes fine, I write my pupils on the paper, offer sake to the gods, and pour it into the river."

Illustrations

Worked examples

Example 1 — a first encounter with Teru teru bōzu

Start with the simplest possible case. Write down what Teru teru bōzu 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 Teru teru bōzu 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 Teru teru bōzu 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 Teru teru bōzu

In research: Teru teru bōzu 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 Teru teru bōzu 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: Teru teru bōzu is common in secondary-school and first-year university syllabi. It links to neighbouring topics Amulets, Buddhist religious objects, Japanese dolls, so understanding it makes those chapters shorter.
In everyday life: Look for Teru teru bōzu 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 Teru teru bōzu in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Teru teru bōzu 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 Teru teru bōzu out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Teru teru bōzu in simple terms?

Why does Teru teru bōzu 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 Teru teru bōzu?

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 Teru teru bōzu.