Biography:Emma Haruka Iwao

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Emma Haruka Iwao
岩尾エマはるか
Born (1984-04-21) April 21, 1984 (age 42)[1]
Kaizuka, Osaka, Japan[2]
Alma materUniversity of Tsukuba
AwardsGuinness World Record for most accurate value of pi (π) in 2019 and 2022[3]
Scientific career
FieldsComputer science
InstitutionsGoogle
Panasonic
GREE
Red Hat[4]
Websiteblog.yuryu.jp

Emma Haruka Iwao (born April 21, 1984) is a Japanese computer scientist and cloud developer advocate at Google.[5][6] In 2019 Haruka Iwao calculated the then world record for most accurate value of pi (π); which included 31.4 trillion digits, exceeding the previous record of 22 trillion.[7][8][9][10][11] This record was surpassed in 2020 by Timothy Mullican who calculated 50 trillion digits,[12][13] but she reclaimed the record in 2022 with 100 trillion digits.[14] The record was surpassed by a computer storage company in 2024, reaching roughly 105 trillion digits.[15] She identifies as queer.[16]

Early life and education

As a child, Iwao became interested in pi, learning of the record-breaking computations of her Japanese compatriots Daisuke Takahashi and Yasumasa Kanada.[7][17] She studied computer science at the University of Tsukuba, where she was taught by Takahashi.[6][5] She was awarded the Dean's Award for Excellence in 2008, before starting graduate studies in computing. Her master's thesis considered high performance computer systems.[6] After graduating, Iwao took on several software engineering positions, working on site reliability for Panasonic, GREE and Red Hat.[5]

Career

Iwao joined Google as a Cloud Developer Advocate in 2015.[7] She originally worked for Google in Tokyo, before moving to Seattle in 2019.[4] Iwao offers training in the use of the Google Cloud Platform (GCP), as well as supporting application developers.[18][19][20] She works to make cloud computing accessible for everyone, creating online demos and teaching materials.[21]

In March 2019 Iwao calculated the value of pi to 31,415,926,535,897 digits (equal to ⌊π × 1013⌋), using 170 terabytes (TB) of data.[7][22][3][23] The calculation used a multithreaded program called y-cruncher using over 25 machines for 121 days.[7][24][21] This was the first time the record had been set using a cloud computing service, and was achieved at a cost of roughly US$200,000.[25]

In March 2022 she extended the world record to 100 trillion digits of pi.[14]

See also

References

  1. ↑ Iwao, Emma Haruka [@Yuryu] (2022-04-21). "I turn 38 today! 12-year-old me would assume adults know everything but I know I was wrong! I'm trying something new this year that I haven't done in a while, so I'm really excited about that. I've made a lot of progress with my Mandarin so I'm happy with that, too.". https://twitter.com/Yuryu/status/1517214000760598528. 
  2. ↑ "1人の女性がエンジニアになるまで 〜yuryuの場合〜" (in ja). 2021-02-02. https://note.com/yuryu/n/n7d8730b8bba0. 
  3. ↑ 3.0 3.1 Anon (2019). "Most accurate value of pi" (in en-GB). Guinness World Records. http://www.guinnessworldrecords.com/world-records/66179-most-accurate-value-of-pi. 
  4. ↑ 4.0 4.1 Iwao, Emma Haruka (2019). "Emma Haruka Iwao: Developer Advocate for Google Cloud Platform". LinkedIn. https://www.linkedin.com/in/yuryu. 
  5. ↑ 5.0 5.1 5.2 "Google Developer Day". https://www.google.cn/intl/en/events/developerdays2017china/speakers/. 
  6. ↑ 6.0 6.1 6.2 Neagle, Mia (2019-03-14). "A recipe for beating the record of most-calculated digits of pi" (in en). https://www.blog.google/products/google-cloud/most-calculated-digits-pi/. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 Kleinman, Zoe (2019-03-14). "Woman smashes pi world record" (in en-GB). BBC. https://www.bbc.com/news/technology-47524760. 
  8. ↑ {{Twitter}} template missing ID and not present in Wikidata.
  9. ↑ Anon (2019). "Beating the record of most-calculated digits of pi". YouTube. https://www.youtube.com/watch?v=JvEvTcXF-4Q. 
  10. ↑ Brodeur, Nicloe (2019). "Woman sets world record in Seattle for calculating the value of pi to 31.4 trillion decimal places". Seattle Times. https://www.seattletimes.com/seattle-news/a-calculating-woman-sets-a-world-record-in-seattle/. 
  11. ↑ Shaban, Hamza (2019-03-14). "A Google employee just shattered the record for Pi calculations. Her name is Emma Haruka Iwao". Washington Post. https://www.washingtonpost.com/business/2019/03/14/google-employee-breaks-guinness-world-record-calculating-trillion-digits-pi/. 
  12. ↑ "The Pi Record Returns to the Personal Computer". http://numberworld.org/y-cruncher/news/2020.html#2020_1_29. 
  13. ↑ "Calculating Pi: My attempt at breaking the Pi World Record". 26 June 2019. https://blog.timothymullican.com/calculating-pi-my-attempt-breaking-pi-record. 
  14. ↑ 14.0 14.1 Iwao, Emma Haruka. "Calculating 100 trillion digits of pi on Google Cloud" (in en). https://cloud.google.com/blog/products/compute/calculating-100-trillion-digits-of-pi-on-google-cloud/. 
  15. ↑ Baker, Harry (2024-03-15). "Pi calculated to 105 trillion digits, smashing world record" (in en). https://www.livescience.com/physics-mathematics/mathematics/pi-calculated-to-105-trillion-digits-smashing-world-record. 
  16. ↑ Braidwood, Ella (18 March 2019). "Queer Google's queer female pi world record breaker hopes to inspire LGBT community". PinkNews. https://www.pinknews.co.uk/2019/03/18/google-queer-female-pi-tech-record-breaker-inspire-lgbt-community/. 
  17. ↑ Francesca Paris (14 March 2019). "The Woman Who Calculated 31 Trillion Digits Of Pi". NPR. https://www.npr.org/2019/03/14/703566696/the-woman-who-calculated-31-trillion-digits-of-pi. 
  18. ↑ mad\djchilsx (2017-11-10). "Hands-on | Intel® HPC Developer Conference" (in en). Intel. https://software.intel.com/en-us/events/hpc-devcon/2017/hands-on-tutorials. 
  19. ↑ Anon (2019). "Emma Haruka Iwao" (in en-US). Lesbians Who Tech. https://lesbianswhotech.org/speakers/emma-haruka-iwao/. 
  20. ↑ Brito, Christopher (2019). "This Google employee just smashed the world record for calculating pi" (in en-US). CBS News. https://www.cbsnews.com/news/pi-world-record-google-employee-emma-haruka-iwao-calculating-31-trillion-digits/. 
  21. ↑ 21.0 21.1 Kelly, Heather (2019). "A Google employee just broke the world record for calculating pi". CNN. https://www.cnn.com/2019/03/14/tech/pi-day-record-google/index.html. 
  22. ↑ Herbert, Tom (2019-03-14). "A Google employee has smashed the Pi world record... on Pi Day" (in en). London: Evening Standard. https://www.standard.co.uk/tech/google-emma-haruka-iwao-calculates-pi-to-world-record-a4091796.html. 
  23. ↑ Shaban, Hamza (2019). "Pi Day news: Google employee breaks record, calculates 31.4 trillion digits of Pi" (in en-US). Chicago Tribune. https://www.chicagotribune.com/business/ct-biz-google-pi-day-record-calculation-20190314-story.html. 
  24. ↑ Yee, Alexander J. (2019). "y-cruncher - A Multi-Threaded Pi Program". http://www.numberworld.org/y-cruncher/. 
  25. ↑ Emma Haruka Iwao; Alexander Yee (13 April 2019). CMP300: How We Broke the World Record for Computing Digits of Pi (31.4 trillion!). 7:33 minutes in. Retrieved 11 December 2025.



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