Tadashi Sasaki (engineer)

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Tadashi Sasaki (佐々木 正, Sasaki Tadashi, May 12, 1915[1] – January 31, 2018)[2][3] was a Japanese engineer who was influential in founding Busicom, driving the deployment of the Intel 4004 microprocessor, and later driving Sharp into the LCD calculator market.[4] Son of a teacher, Sasaki grew up in Taiwan and studied electrical engineering at Kyoto University, later working in Kobe Kogyo, the first Japanese company to manufacture transistors, and then in Hayakawa Electrical Industries, where he helped to develop electronic calculators.[5] This eventually led him to obtain American patent licences to fabricate integrated chips and thus the first commercially successful pocket calculator. His subordinates at Hayakawa company knew him as "Doctor Rocket" due to his hyperactive nature.


  1. ^ Shimbun, Nihon Kogyo (1984). Business Japan - Volume 29, Issues 7-12. 52: Nihon Kogyo Shimbun.
  2. ^ https://wired.jp/2018/02/04/rip-rocket-sasaki/
  3. ^ https://www.asahi.com/articles/ASL22721WL22PLFA00X.html
  4. ^ Aspray, William (1994-05-25). "Oral-History: Tadashi Sasaki". Interview #211 for the Center for the History of Electrical Engineering. The Institute of Electrical and Electronics Engineers, Inc. Retrieved 2013-01-02.
  5. ^ Johnstone, Bob (1999). We were burning: Japanese entrepreneurs and the forging of the electronic age. New York: A Cornelia and Michael Bessie book. pp. 23–60. ISBN 0-465-09118-0.