science

Ōhara Yūgaku

Ōhara Yūgaku 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 Ōhara Yūgaku rather than just read about it. In short: Ōhara Yūgaku (大原幽学; April 13, 1797 – April 21, 1858) was a 19th-century Japanese agronomist, philosopher, moralist and economist. Contemporary with the more famous Ninomiya Sontoku, he combined three strands of traditional teachings — Buddhism, Shinto and Confucianism into practical ethical principles which he applied to form an agricultural cooperative in 1838.

Key takeaways

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

Reference excerpt

Ōhara Yūgaku (大原幽学; April 13, 1797 – April 21, 1858) was a 19th-century Japanese agronomist, philosopher, moralist and economist. Contemporary with the more famous Ninomiya Sontoku, he combined three strands of traditional teachings — Buddhism, Shinto and Confucianism into practical ethical principles which he applied to form an agricultural cooperative in 1838.

Biography Ōhara's ancestry is unclear, but it appears that he was born as the second son of Daidoji Naokata, a samurai of Owari Domain. Disowned by his family for unknown reasons when he was 18 years old, he wandered the country as a vagrant through Mino, Yamato, Kyoto and Osaka teaching martial arts, and later fortune telling, using the I Ching or physiognomy. During this period, he formulated a new syncretic religion combining Buddhism, Shinto and Confucianism with elements of Daoism. In 1831, he settled in Shimōsa Province, where he began to attract a number of followers. One of these followers was the headman of Nagabe Village in Katori District (now part of the city of Asahi). Ōhara relocated to this village in 1835, which was located in a large area of reclaimed tidelands, and put his teachings to practical application. He reorganized the local farmers into an agricultural cooperative, undertook land reform, and introduced new agricultural technologies. He reorganized the village's rice fields, which were small and of different shapes into uniform 1000 square meter fields for better efficiency. His efforts to improve the village extended into every aspect of the lives of the inhabitants. Ōhara encouraged fiscal frugality and savings, banned gambling, established a school for all of the village children, and insisted that his teachings on morality be practiced by all the inhabitants. He constructed a large building, the "Kaishinro" for village assemblies and as a teaching center. By 1848, the village had become very prosperous and was regarded as a model village within Katori District. However, the Tokugawa shogunate looked on these unorthodox social and economic experiments with deep suspicion, especially as it was being controlled by a self-proclaimed leader of an unauthorized new religion with uncertain antecedents. After peasant unrest in the area in 1852, Ōhara was arrested by the Kanjō bugyō. He spent the next five years attempting to clear his name, but in 1857, he was re-arrested for sedition, and incarcerated for 100 days, during which time the Shogunate ordered that his agricultural cooperative be destroyed and his teachings banned. Ōhara committed seppuku the following year.

Ohara Yugaku Museum

A commemorative museum to Ōhara's life and works is located in front of the site of his house in Asahi. The house itself still exists, and along with his tomb was proclaimed a National Historic Site in 1952. The house was designed by Ōhara himself in 1842 and was a simple structure with a single eight-tatami mat room with kitchen and toilet. The "Kaishinro" teaching hall no longer exists, having been destroyed in 1852 by neighboring villagers at the instigation of the shogunate. A Shinto shrine dedicated to Ōhara now stands on its site.

Illustrations

Worked examples

Example 1 — a first encounter with Ōhara Yūgaku

Start with the simplest possible case. Write down what Ōhara Yūgaku 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 Ōhara Yūgaku 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 Ōhara Yūgaku 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 Ōhara Yūgaku

In research: Ōhara Yūgaku 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 Ōhara Yūgaku 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: Ōhara Yūgaku is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1797 births, 1858 deaths, 19th-century Japanese philosophers, so understanding it makes those chapters shorter.
In everyday life: Look for Ōhara Yūgaku 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 Ōhara Yūgaku in 20 minutes

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

Frequently asked questions

What is Ōhara Yūgaku in simple terms?

Why does Ōhara Yūgaku 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 Ōhara Yūgaku?

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 Ōhara Yūgaku.