engineering

Gengo Matsui

Gengo Matsui 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 Gengo Matsui rather than just read about it. In short: Gengo Matsui ( 松井源吾, Matsui Gengo, 1920-1996) was a prominent Japanese structural engineer and professor at Waseda University. Throughout his career, he collaborated with several renowned Japanese architects including Kiyonori Kikutake (1928–2011), Kisho Kurokawa (1934–2007), Toyo Ito (born 1941), and Shigeru Ban (born 1957).

Key takeaways

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

Reference excerpt

Gengo Matsui ( 松井源吾, Matsui Gengo, 1920-1996) was a prominent Japanese structural engineer and professor at Waseda University. Throughout his career, he collaborated with several renowned Japanese architects including Kiyonori Kikutake (1928–2011), Kisho Kurokawa (1934–2007), Toyo Ito (born 1941), and Shigeru Ban (born 1957). Gengo Matsui was active both in academia and in practice through his research lab at Waseda University and through his structural design office O.R.S., namely. He is best known for the structural design of several iconic buildings of Japanese metabolism like the Nakagin Capsule Tower (1972), the Osaka Expo Tower (1970), and the Miyakonojo Civic Center (1966). The ability to work at different scales and using different materials allowed Matsui creating a dense network of interdisciplinary collaborations and a wide range of different projects. In the early 1960s, his experiments with reinforced concrete also in collaboration with the architect Kikutake led to the patenting of the void slab system in Japan, a novel cast-in-situ slab system still largely used today in Japan. Towards the end of his career, Matsui engaged with Shigeru Ban's paper architecture series, developing design solutions in such a way to activate cardboard elements as actual load-bearing elements. Matsui also engaged in research related to wood joinery and modular steel structures, such as Toyo Ito's Silver Hut or Kikutake's Osaka Expo Tower. Among architects and collaborators, Matsui was known for consistently using photoelasticity to understand and explain the behavior of structures. He used photoelastic experiments both as a visual tool to investigate force flows within structural members as well as a tool to communicate structural design ideas to architects. After Matsui retired from Waseda University, the Matsui Gengo Prize for structural design was established. A total of 15 honorable contributions to the field of structural design were awarded with the Matsui Gengo Prize between 1991 and 2005. Among the winners were the Irish structural engineer Peter Rice for his work on the Kansai International Airport (awarded in 1995) and the British Sri Lankan engineer Cecil Balmond for his work on the Ito-Balmond Serpentine Pavilion (awarded in 2003).

List of works Administrative building of Izumo Shrine, Shimane, 1963 Tatebayashi City Hall (1963) Hotel Tokoen (1964) Toku’un-ji Temple Ossuary (1965) Pacific Hotel Chigasaki, Kanagawa, 1966 Miyakonojo Civic Hall, Miyazaki, 1966. Demolished. Waseda University Faculty of Science and Engineering Building No. 51 (1967) Expo Tower, Expo '70, Osaka, 1969 Nakagin Capsule Tower (1972 - Demolished in 2022) BIGBOX Takadanobaba (1973) Setagaya Museum of Art (1985) Edo-Tokyo Museum, Tokyo, 1993

Publications In English:

Matsui, G. (1977). Introduction to Structural Design in Architecture. Sumiyoshi, T., & Matsui, G. (1989). Wood joints in classical Japanese Architecture. Kajima Institute Publishing Co., Ltd. Matsui, G. (1990). Structural Design in Japanese Architecture. The Gengo Matsui's Works Editing Committee. Matsui, G. (1990). Fringes: A visual approach to the understanding of structures. Kajima Institute Publishing Co., Ltd.

References

Worked examples

Example 1 — a first encounter with Gengo Matsui

Start with the simplest possible case. Write down what Gengo Matsui 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 Gengo Matsui 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 Gengo Matsui 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 Gengo Matsui

In research: Gengo Matsui 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 Gengo Matsui 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: Gengo Matsui is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1920 births, 1996 deaths, 20th-century Japanese engineers, so understanding it makes those chapters shorter.
In everyday life: Look for Gengo Matsui 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Gengo Matsui” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Gengo Matsui in 20 minutes

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

Frequently asked questions

What is Gengo Matsui in simple terms?

Why does Gengo Matsui 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 Gengo Matsui?

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 Gengo Matsui.