engineering

Gakutensoku

Gakutensoku is a engineering 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 Gakutensoku rather than just read about it. In short: Gakutensoku (Japanese: 學天則; learning from the laws of nature) was the first robot to be built in East Asia and was created in Osaka in the late 1920s. The robot was designed and manufactured by biologist Makoto Nishimura.

Key takeaways

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

Reference excerpt

Gakutensoku (Japanese: 學天則; learning from the laws of nature) was the first robot to be built in East Asia and was created in Osaka in the late 1920s. The robot was designed and manufactured by biologist Makoto Nishimura.

History Nishimura had served as a professor at Hokkaido Imperial University, studied Marimo and was an editorial adviser to the Osaka Mainichi newspaper (now the Mainichi Shimbun). Concerned about the idea of robots seen as slaves to humans, particularly as portrayed in the play R.U.R., written by Karel Čapek, Nishimura set out to build a different kind of robot. The robot he wanted to build would celebrate nature and humanity, and rather than a slave, it would be a friend, and even an inspirational model, to people. In 1926, Nishimura resigned from Hokkaido Imperial University, moved to Osaka, and started building his robot, with help from a small team of assistants. He named his robot Gakutensoku. Gakutensoku was first displayed in September 1928 in Kyoto, and the following year it was exhibited in Tokyo, Osaka, and Hiroshima, at the Chosun Exhibition in Korea, and in China. Gakutensoku disappeared in the 1930s; the details of its disappearance are unknown.

Description Gakutensoku could change its facial expression and move its head and hands via an air pressure mechanism. It had a pen-shaped signal arrow in its right hand and a lamp named Reikantō (靈感燈, 'inspiration light') in its left hand. Perched on top of Gakutensoku was a bird-shaped robot named Kokukyōchō (告曉鳥, 'bird informing dawn'). When Kokukyōchō cried, Gakutensoku's eyes closed and its expression became pensive. When the lamp shone, Gakutensoku started to write words with the pen.

Legacy An asteroid, 9786 Gakutensoku, was named after the robot. A modern version of Gakutensoku was produced in 2008 by the Osaka Science Museum, where it is now on display.

Cultural references Gakutensoku and its creator, Makoto Nishimura, appear in Hiroshi Aramata's novel Teito Monogatari and the subsequent film based on the novel. In the film Makoto is portrayed by his real-life son, actor Kō Nishimura. A similar robot named Hisoutensoku is the main feature of the fighting game Touhou Hisōtensoku and was inspired from the Gakutensoku. The names of three characters in Murasakiiro no Qualia are based on each of the three kanji in "Gakutensoku". Gakutensoku is mentioned in the manga series Keep Your Hands Off Eizouken! and the subsequent anime adaptation.

Illustrations

Worked examples

Example 1 — a first encounter with Gakutensoku

Start with the simplest possible case. Write down what Gakutensoku claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Gakutensoku 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 Gakutensoku 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 Gakutensoku

In research: Gakutensoku appears in engineering 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 Gakutensoku 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: Gakutensoku is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1929 in Japan, 1929 robots, Historical robots, so understanding it makes those chapters shorter.
In everyday life: Look for Gakutensoku 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 Gakutensoku in 20 minutes

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

Frequently asked questions

What is Gakutensoku in simple terms?

Why does Gakutensoku matter?

Because it connects several engineering 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 Gakutensoku?

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 Gakutensoku.