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Kikuchi Dairoku

Kikuchi Dairoku is a mathematics 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 Kikuchi Dairoku rather than just read about it. In short: Baron Kikuchi Dairoku (菊池 大麓; 17 March 1855 – 19 August 1917) was a Japanese mathematician, educator, and education administrator during the Meiji era. After earning degrees in mathematics and physics from St John's College at the University of Cambridge, he became one of the first Japanese professors of mathematics at the University of Tokyo.

Kikuchi Dairoku — main illustration
Kikuchi Dairoku — illustration

Key takeaways

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

Reference excerpt

Baron Kikuchi Dairoku (菊池 大麓; 17 March 1855 – 19 August 1917) was a Japanese mathematician, educator, and education administrator during the Meiji era. After earning degrees in mathematics and physics from St John's College at the University of Cambridge, he became one of the first Japanese professors of mathematics at the University of Tokyo. Later in his life, he served as president of the University of Tokyo, Kyoto University, Gakushuin, and the Riken Institute.

Early life and family Kikuchi was born in Edo (present-day Tokyo), as the second son of Mitsukuri Shūhei, a professor at Bansho Shirabesho, himself the adopted son of Mitsukuri Gempo, a Shogunate professor. The Mitsukuri family had distinguished themselves as scholars, and were at the centre of Japan's educational system in the Meiji era. His grandfather had been a student of Dutch studies ("rangaku"). Kikuchi Dairoku changed his surname from Mitsukuri to Kikuchi upon succeeding as the heir to his father's original family; the requisite legal procedures were completed in 1877.

Education After attending the Bansho Shirabesho, the Shogunal institute for western studies, he was sent to Great Britain, in 1866, at age 11, the youngest of a group of Japanese sent by the Tokugawa shogunate to the University College School, on the advice of the then British foreign minister Edward Stanley, 15th Earl of Derby. Kikuchi returned to England in 1870 and was the first Japanese student to graduate from the University of Cambridge (St. John's College) and the only one to graduate from the University of London in the 19th century. His specialisation was in physics and mathematics. In 1884 he attended the International Meridian Conference in Washington, D.C., and the master class of Kelvin in Baltimore.

Career After returning to Japan, Kikuchi later became president of Tokyo Imperial University, Minister of Education (1901–1903) and president of Kyoto Imperial University. In 1909 he lectured in London on Japanese Education and 1910 at New York on New Japan: Its Intellectual and Moral Development. His textbook on elementary geometry was the most widely used geometry textbook in Japan until the end of World War II. Kikuchi was made a baron under the kazoku peerage system in 1902 and was the eighth president of the Gakushūin Peers' School. In 1917 he became the first president of Riken, but died that same year.

Family and issue Kikuchi's children became well-known scientists, and his grandson Minobe Ryōkichi became governor of Tokyo.

See also

General Japanese students in Britain Tokyo Imperial University University of Cambridge Anglo-Japanese relations Hayashi Tadasu – another member of the group sent to Britain in 1866, by the Bakufu Imperial Rescript on Education

Japanese at Cambridge Other Japanese who studied at the University of Cambridge after Kikuchi:

Inagaki Manjirō Ōkura Kishichirō Suematsu Kenchō Tanaka Ginnosuke

British contemporaries at Cambridge British contemporaries of Kikuchi at the University of Cambridge:

Donald MacAlister Karl Pearson – a close friend and contemporary of Kikuchi at University College School and the University of Cambridge Charles Algernon Parsons

References

Cobbing, Andrew. The Japanese Discovery of Victorian Britain. RoutledgeCurzon, London, 1998. ISBN 1-873410-81-6 Keane, Donald. Emperor Of Japan: Meiji And His World, 1852–1912. Columbia University Press (2005). ISBN 0-231-12341-8 'Kikuchi Dairoku, 1855–1917: Educational Administrator and Pioneer of Modern Mathematical Education in Japan,' by Noboru Koyama, Chapter 7, Britain & Japan: Biographical Portraits Volume 5, Global Oriental 2005, ISBN 1-901903-48-6

External links

Japanese Students at Cambridge University in the Meiji Era, 1868–1912: Pioneers for the Modernization of Japan, by Noboru Koyama, translated by Ian Ruxton [1], (Lulu Press, September 2004, ISBN 1-4116-1256-6). Kikuchi is the central figure in this book. Portrait of Kikuchi Dairoku on the National Diet Library database, Tokyo RIKEN — The Science Research Institute of Japan Works by Dairoku Kikuchi at Project Gutenberg Works by or about Kikuchi Dairoku at the Internet Archive

Illustrations

Kikuchi Dairoku illustration

Worked examples

Example 1 — a first encounter with Kikuchi Dairoku

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

In research
Kikuchi Dairoku appears in mathematics 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 Kikuchi Dairoku 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
Kikuchi Dairoku is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1855 births, 1917 deaths, 19th-century Japanese mathematicians, so understanding it makes those chapters shorter.
In everyday life
Look for Kikuchi Dairoku 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 Kikuchi Dairoku in 20 minutes

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

Frequently asked questions

What is Kikuchi Dairoku in simple terms?

Baron Kikuchi Dairoku (菊池 大麓; 17 March 1855 – 19 August 1917) was a Japanese mathematician, educator, and education administrator during the Meiji era. After earning degrees in mathematics and physics from St John's College at the University of Cambridge, he became one of the first Japanese profess…

Why does Kikuchi Dairoku matter?

Because it connects several mathematics 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 Kikuchi Dairoku?

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 Kikuchi Dairoku.

Tags

  • 1855 births
  • 1917 deaths
  • 19th-century Japanese mathematicians
  • 20th-century Japanese mathematicians
  • Academic staff of Kyoto University
  • Academic staff of the University of Tokyo
  • Alumni of St John's College, Cambridge
  • Alumni of the University of London
  • Education ministers of Japan
  • Japanese expatriates in the United Kingdom
  • Kazoku
  • Mathematicians from Tokyo

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