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computer science

Seiko

Seiko is a computer 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 Seiko rather than just read about it. In short: Seiko Group Corporation (セイコーグループ株式会社, Seikō Gurūpu kabushiki gaisha), commonly known as Seiko ( SAY-koh, Japanese: [seːkoː]), is a Japanese maker of watches, clocks, electronic devices, and semiconductors. Founded in 1881 by Kintarō Hattori in Tokyo, Seiko introduced the world's first commercial quartz wristwatch in 1969.

Seiko — main illustration
Seiko — illustration

Key takeaways

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

Reference excerpt

Seiko Group Corporation (セイコーグループ株式会社, Seikō Gurūpu kabushiki gaisha), commonly known as Seiko ( SAY-koh, Japanese: [seːkoː]), is a Japanese maker of watches, clocks, electronic devices, and semiconductors. Founded in 1881 by Kintarō Hattori in Tokyo, Seiko introduced the world's first commercial quartz wristwatch in 1969. Seiko is widely known for its wristwatches. Seiko and Rolex are the only two watch companies considered to be vertically integrated. Seiko is able to design and develop all the components of a watch, as well as assemble, adjust, inspect and ship them in-house. Seiko's mechanical watches consist of approximately 200 parts, and the company has the technology and production facilities to design and manufacture all of these parts internally. The company was incorporated (K. Hattori & Co., Ltd.) in 1917 and renamed Hattori Seiko Co., Ltd. in 1983 and Seiko Corporation in 1997. After reconstructing and creating its operating subsidiaries (such as Seiko Watch Corporation and Seiko Clock Inc.), it became a holding company in 2001 and was renamed Seiko Holdings Corporation on July 1, 2007. Seiko Holdings Corporation was renamed Seiko Group Corporation as of October 1, 2022. Seiko watches were originally produced by two Hattori family companies (not subsidiaries of K. Hattori & Co); one was Daini Seikosha Co. (now known as Seiko Instruments Inc., a subsidiary of Seiko Holdings since 2009) and the other was Suwa Seikosha Co. (now known as Seiko Epson Corporation, an independent publicly traded company). Having two companies both producing the same brand of watch enabled Seiko to improve technology through competition and hedge risk. It also reduced risk of production problems, since one company can increase production in the case of decreased production in the other parties. Seiko remains as one of the world's most recognised watchmaking brands. In Ginza, where the company was founded, there are several Seiko-related facilities in addition to Seiko House Ginza, including the Seiko Museum and Seiko Dream Square. Several Seiko boutiques and department stores in the area frequently offer Ginza-exclusive models.

History

1881 founding to 1929

In 1881, Seiko founder Kintarō Hattori opened a watch and jewelry shop called "K. Hattori" (服部時計店) in Tokyo. Kintarō Hattori had been working as clockmaker apprentice since the age of 13, with multiple stints in different watch shops, such as “Kobayashi Clock Shop”, run by an expert technician named Seijiro Sakurai; “Kameda Clock Shop” in Nihonbashi; and “Sakata Clock Shop” in Ueno, where he learned how to both sell and repair timepieces. Around the time of Seiko's founding, watchmakers in Tokyo, Osaka, and Nagoya were studying and producing pocket watches based on Western products. Japanese wholesalers needed to purchase all the imported timepieces from foreign trading companies established in Yokohama, Kobe, and other open port areas. In 1885, Hattori began dealing directly with these foreign trading firms in the Yokohama settlement focused on the wholesaling and retailing of western (imported) timepieces and machinery. Over the years, Hattori developed a close partnership with multiple foreign trading firms, including C&J Favre-Brandt, F. Perregaux & Co., Zanuti & Cie. and Siber & Brennwald, allowing him to obtain exclusive imported timepieces and machinery, which was not available elsewhere at that time. Hattori's shop became increasingly popular due to the rarity of the imported watches the shop was selling, which were not found anywhere else in Japan. The growing success allowed him to relocate the company to the main street of Ginza (Tokyo), still the epicenter of commerce in Japan to this day. In 1891, 10 years after the establishment of K. Hattori & Co., the 31-year-old Kintaro was appointed director of the Tokyo Clockmaker and Watchmaker Association and member of Tokyo Chamber of Commerce. In 1892, Hattori began to produce clocks under the name Seikosha (精工舎, Seikōsha), meaning, roughly, "House of Exquisite Workmanship." According to Seiko's official company history, titled A Journey In Time: The Remarkable Story of Seiko (2003), Seiko is a Japanese word meaning "exquisite" (精巧, Seikō); it is homophonous with the word for "success" (成功, Seikō). In 1895, the watch dealer purchased the corner of Ginza 4-chome (the present-day location of WAKO), and constructed a building with a clock tower (16 meters from top to bottom), setting up shop at the new address. Seiko launched its first in-house pocket watch, the Timekeeper, in 1895; the first Japanese-made wristwatch, the Laurel, in 1913; and the first Seiko-branded wristwatch in 1924. Wristwatches and pocket watches completed in 1923 were provisionally given the name "Glory." However, since its pronunciation was similar to "gorori" (ゴロリ), a Japanese onomatopoeia for tumbling, which was considered unlucky, it was decided that the brand name for watches to be mass-produced from 1924 would be "Seiko." In 1929, the Seiko pocket watch was adopted as the official watch for the drivers of Japanese Government Railways.

1930 to 1990 Military watches, notably the "Seikosha Type 93 Tensoku-Dokei" produced for Japanese troops during World War II were manufactured by Seiko, which by 1938, produced 1.2 million timepieces a year. The scarcity of raw materials during the war diverted much of Seiko's production to on-board instruments for military aircraft and ships. In contrast to Japan, Germany utilized both domestically produced and Swiss-produced watches. Japan's isolation in the Pacific meant the country could not rely on importing foreign timepieces.

… excerpt ends here. Continue reading the full article.

Illustrations

Seiko illustration
Seiko illustration
Seiko: Portrait of Kintarō Hattori, 1916
Portrait of Kintarō Hattori, 1916
Seiko: Seiko Group in 1933
Seiko Group in 1933
Seiko illustration

Worked examples

Example 1 — a first encounter with Seiko

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

In research
Seiko appears in computer 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 Seiko 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
Seiko is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1940s initial public offerings, Belgian Royal Warrant holders, Clock brands, so understanding it makes those chapters shorter.
In everyday life
Look for Seiko 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 Seiko in 20 minutes

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

Frequently asked questions

What is Seiko in simple terms?

Seiko Group Corporation (セイコーグループ株式会社, Seikō Gurūpu kabushiki gaisha), commonly known as Seiko ( SAY-koh, Japanese: [seːkoː]), is a Japanese maker of watches, clocks, electronic devices, and semiconductors. Founded in 1881 by Kintarō Hattori in Tokyo, Seiko introduced the world's first commercial q…

Why does Seiko matter?

Because it connects several computer 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 Seiko?

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 Seiko.

Tags

  • 1940s initial public offerings
  • Belgian Royal Warrant holders
  • Clock brands
  • Clock manufacturing companies of Japan
  • Companies listed on the Tokyo Stock Exchange
  • Computer companies of Japan
  • Computer hardware companies
  • Computer printer companies
  • Conglomerate companies based in Tokyo
  • Electronics companies of Japan
  • Eyewear brands of Japan
  • Holding companies based in Tokyo

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