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Ikutaro Kakehashi

Ikutaro Kakehashi 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 Ikutaro Kakehashi rather than just read about it. In short: Ikutaro Kakehashi (梯 郁太郎, Kakehashi Ikutarō; 7 February 1930 – 1 April 2017), also known by the nickname Taro, was a Japanese engineer, inventor, and entrepreneur. He founded the musical instrument manufacturers Ace Tone, Roland Corporation and Boss Corporation, and the audiovisual electronics company ATV Corporation.

Ikutaro Kakehashi — main illustration
Ikutaro Kakehashi — illustration

Key takeaways

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

Reference excerpt

Ikutaro Kakehashi (梯 郁太郎, Kakehashi Ikutarō; 7 February 1930 – 1 April 2017), also known by the nickname Taro, was a Japanese engineer, inventor, and entrepreneur. He founded the musical instrument manufacturers Ace Tone, Roland Corporation and Boss Corporation, and the audiovisual electronics company ATV Corporation. Kakehashi founded Ace Tone in 1960 to produce electronic organs and early drum machines. He founded Roland in 1972 and was involved in the development of various influential electronic instruments, such as the TR-808 and TR-909 drum machines and the TB-303 and Juno-60 synthesizers, in addition to Boss guitar amplifiers and effects pedals. He was also key to the development of MIDI, a technical standard that connects a wide variety of electronic instruments, in the 1980s; in 2013, Kakehashi received a Technical Grammy Award, shared with Dave Smith of Sequential, for the invention of MIDI. Kakehashi's inventions are credited with shaping popular music genres such as electronic, dance, hip hop, R&B, rock and pop music.

Early life Kakehashi was born on 7 February 1930 in Osaka, Japan. His parents died of tuberculosis during his early childhood, and he was raised by his grandparents. Much of his childhood was spent studying electrical engineering and working in the Hitachi shipyards of Osaka. During World War II, with no music lessons, Kakehashi became interested in radio as a way of listening to music, and his home was destroyed by American bombing. Following the war, in 1946, he failed to get into a university on health grounds, and moved to the southern island of Kyushu.

Career In 1947, aged 16, Kakehashi founded the Kakehashi Clock Store, a watch-repair shop. He soon began repairing radios. He later returned to Osaka to attend university. During a mass food shortage, he contracted tuberculosis and spent several years in a sanitarium, where he became a clinical trial test patient for an experimental medicine antibiotic drug, streptomycin, which improved his condition. In 1954, Kakehashi opened the Kakehashi Radio electrical appliance store. In his spare time, he repaired electronic organs and created prototype organs throughout the 1950s. At 28, he decided to devote himself to music and pursuit of the ideal electronic musical instrument. Kakehashi had no musical training, and wanted musical instruments to be accessible for both professionals and amateurs like himself. He also wanted them to be inexpensive, intuitive, small, and simple. He constructed his first 49-key monophonic organ in 1959, specifically designed to be playable by anyone, with no musical skill necessary. The focus on miniaturization, affordability, and simplicity later became fundamental to product development at Roland.

Ace Tone

In 1960, Kakehashi founded Ace Electronic Industries Inc. In 1964, he developed the first fully transistorized electronic drum instrument, the R1 Rhythm Ace, which was exhibited at the Summer NAMM Convention in 1964. It was a push-button device that was manually hand-operated in a manner similar to modern electronic drum pads. It was not commercialized in North America due to its lack of automated preset rhythms, so Kakehashi began work on fully transistorized electronic rhythm machine. In 1967, Kakehashi patented the "Automatic Rhythm Performance Device" drum machine, a preset rhythm-pattern generator using diode matrix circuit, a drum machine whereby a "plurality of inverting circuits and/or clipper circuits are connected to a counting circuit to synthesize the output signal of the counting circuit" and the "synthesized output signal becomes a desired rhythm". Ace Tone popularized the use of drum machines, with the FR-1 Rhythm Ace finding its way into popular music starting in the late 1960s.

Roland

In 1972, Kakehashi founded the Roland Corporation, and led it for four decades. While their rival companies Moog and ARP targeted professional musicians and academics, Kakehashi, who had no musical training, wanted to appeal to amateurs and hobbyists, and focused on miniaturization, affordability and simplicity. Roland had a major impact on popular music and had more influence on electronic music than any other company. At Roland, he continued his work on the development of drum machines. Roland's first drum machine was the Roland TR-77, released in 1972. After Kakehashi realized microprocessors could be used to program drum machines, Roland launched the CR-78, the first microprocessor-driven programmable drum machine, in 1978. These 1970s Roland drum machines were used in disco, R&B, rock, and pop songs from the early 1970s to the early 1980s. During the 1980s and 1990s, Roland released several instruments that have had a lasting influence on popular music. Roland launched the TR-808, the first fully programmable drum machine, in 1980. Kakehashi deliberately purchased faulty transistors that created the machine's distinctive "sizzling" sound. Although it was not an immediate commercial success, the 808 was eventually used on more hit records than any other drum machine and became a cornerstone of the emerging electronic and hip hop genres. In 1994, Kakehashi founded the Roland Foundation and became chairman. In 1995, he was appointed chairman of Roland Corporation. In 2001, he resigned from the position and was appointed as special executive adviser of Roland Corporation. In 2002, Kakehashi published an autobiography, I Believe in Music. His second book, An Age Without Samples: Originality and Creativity in the Digital World, was published in 2017.

Boss

In 1973, Kakehashi founded Boss Corporation, a subsidiary of Roland that produces amplifiers and effects units for electric guitar and bass guitar players. Boss effects units became the de facto standard of guitar effects for decades, with many guitarists relying on them for sonic experimentation. Boss amplifiers and effects units have had a significant impact on the development of rock music since the 1970s.

MIDI

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Ikutaro Kakehashi

Start with the simplest possible case. Write down what Ikutaro Kakehashi 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 Ikutaro Kakehashi 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 Ikutaro Kakehashi 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 Ikutaro Kakehashi

In research
Ikutaro Kakehashi 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 Ikutaro Kakehashi 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
Ikutaro Kakehashi is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1930 births, 2017 deaths, Businesspeople from Osaka, so understanding it makes those chapters shorter.
In everyday life
Look for Ikutaro Kakehashi 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 Ikutaro Kakehashi in 20 minutes

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

Frequently asked questions

What is Ikutaro Kakehashi in simple terms?

Ikutaro Kakehashi (梯 郁太郎, Kakehashi Ikutarō; 7 February 1930 – 1 April 2017), also known by the nickname Taro, was a Japanese engineer, inventor, and entrepreneur. He founded the musical instrument manufacturers Ace Tone, Roland Corporation and Boss Corporation, and the audiovisual electronics comp…

Why does Ikutaro Kakehashi 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 Ikutaro Kakehashi?

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 Ikutaro Kakehashi.

Tags

  • 1930 births
  • 2017 deaths
  • Businesspeople from Osaka
  • Grammy Award winners
  • Inventors of musical instruments
  • Japanese businesspeople
  • Japanese engineers
  • Japanese inventors
  • Japanese music industry executives
  • Japanese musical instrument makers

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