Kenkichi Iwasawa

Japanese mathematician (1917-1998)
Person human Q933692
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Summary

Kenkichi Iwasawa is a human[1]. Born in Kiryū[2], he… he was born on September 11, 1917[3]. He died in Tokyo[4]. He died on October 26, 1998[5]. He worked as a mathematician[6] and university teacher[7]. He ranks in the top 0.72% of human entities by monthly Wikipedia readership (158 views/month, #7,240 of 1,000,298).[8]

Key Facts

  • Kenkichi Iwasawa's place of birth was Kiryū[2].
  • Kenkichi Iwasawa died in Tokyo[4].
  • Kenkichi Iwasawa passed away in Tokyo[9].
  • Kenkichi Iwasawa was born on September 11, 1917[3].
  • Kenkichi Iwasawa died on October 26, 1998[5].
  • Kenkichi Iwasawa held citizenship in Japan[10].
  • Kenkichi Iwasawa held citizenship in Empire of Japan[11].
  • Kenkichi Iwasawa worked as a mathematician[6].
  • Kenkichi Iwasawa's professions included university teacher[7].
  • Kenkichi Iwasawa's field of work was number theory[12].
  • Kenkichi Iwasawa's field of work was group theory[13].
  • Kenkichi Iwasawa was employed by Princeton University[14].
  • Kenkichi Iwasawa was employed by Massachusetts Institute of Technology[15].
  • Kenkichi Iwasawa was employed by University of Tokyo[16].
  • Kenkichi Iwasawa was employed by Institute for Advanced Study[17].
  • Kenkichi Iwasawa was educated at University of Tokyo[18].
  • Kenkichi Iwasawa's education included a stint at Musashi Junior & Senior High School[19].
  • Kenkichi Iwasawa's doctoral advisor was Shokichi Iyanaga[20].
  • A notable work attributed to Kenkichi Iwasawa is Iwasawa theory[21].
  • A notable work attributed to Kenkichi Iwasawa is Iwasawa decomposition[22].
  • A notable work attributed to Kenkichi Iwasawa is Iwasawa algebra[23].
  • A notable work attributed to Kenkichi Iwasawa is Iwasawa group[24].
  • A notable work attributed to Kenkichi Iwasawa is Iwasawa manifold[25].
  • A notable work attributed to Kenkichi Iwasawa is main conjecture of Iwasawa theory[26].
  • Kenkichi Iwasawa received the Guggenheim Fellowship[27].

Body

Origins and Family

Kenkichi Iwasawa's place of birth was Kiryū[2]. He was born on September 11, 1917[3].

Education

Educated at University of Tokyo[18], a research university[28], in Japan[29], founded in 1877[30], headquartered in Hongō campus[31] and Musashi Junior & Senior High School[19], an unified secondary school in Japan[32], in Japan[33], founded in 1922[34]. Kenkichi Iwasawa's doctoral advisor was Shokichi Iyanaga[20].

Career and Affiliations

Recorded occupations include mathematician[6] and university teacher[7]. Fields of work include number theory[12], a branch of mathematics[35] and group theory[13], a branch of mathematics[36]. Employers include Princeton University[14], a private university[37], in United States[38], founded in 1746[39], headquartered in Princeton[40]; Massachusetts Institute of Technology[15], a university[41], in United States[42], founded in 1861[43], headquartered in Cambridge[44]; University of Tokyo[16], a research university[45], in Japan[46], founded in 1877[47], headquartered in Hongō campus[48]; and Institute for Advanced Study[17], a research institute[49], in United States[50], founded in 1930[51], headquartered in Princeton[52]. Doctoral students include Robert F. Coleman[53], a mathematician[54], 1954–2014[55], of United States[56], awarded the MacArthur Fellows Program[57], specialised in mathematics[58]; Ralph Greenberg[59], a mathematician[60], b. 1944[61], of United States[62], awarded the Fellow of the American Mathematical Society[63], specialised in mathematics[64]; Yasutaka Ihara[65], a mathematician[66], b. 1938[67], of Japan[68], awarded the The Order of the Sacred Treasure, Gold Rays with Neck Ribbon[69]; Eugene M. Luks[70]; Gustave Solomon[71]; and Lawrence C. Washington[72].

Works and Contributions

Notable works include Iwasawa theory[21], Iwasawa decomposition[22], Iwasawa algebra[23], Iwasawa group[24], Iwasawa manifold[25], and main conjecture of Iwasawa theory[26]. Things named for Kenkichi Iwasawa include Iwasawa theory[73], a branch of mathematics[74] and Iwasawa decomposition[75].

Recognition

Awards received include Guggenheim Fellowship[27], a fellowship grant[76], in United States[77], founded in 1925[78]; Cole Prize in Number Theory[79], a science award[80], founded in 1931[81]; Asahi Prize[82], an award[83], in Japan[84], founded in 1929[85]; Fujihara Award[86], a science award[87], in Japan[88], founded in 1959[89]; and Japan Academy Prize[90], an academic award[91], in Japan[92], founded in 1948[93].

Death and Burial

Kenkichi Iwasawa died on October 26, 1998[5]. Recorded place of death include Tokyo[4], a metropolitan prefecture[94], in Japan[95], founded in 1868[96], headquartered in Tokyo Metropolitan Government Building[97]. The cause of death was pneumonia[98].

Why It Matters

Kenkichi Iwasawa ranks in the top 0.72% of human entities by monthly Wikipedia readership (158 views/month, #7,240 of 1,000,298).[8] He has Wikipedia articles in 15 language editions, a strong signal of global cultural recognition.[99] He is known by 13 alternative names across languages and contexts.[100]

Entities named for him include Iwasawa theory[73], a branch of mathematics[74] and Iwasawa decomposition[75].

His notable doctoral advisees include Yasutaka Ihara[101], a mathematician[102], b. 1938[103], of Japan[104], awarded the The Order of the Sacred Treasure, Gold Rays with Neck Ribbon[105]; Gustave Solomon[106], a mathematician[107], 1930–1996[108], of United States[109], awarded the IEEE Masaru Ibuka Consumer Electronics Award[110]; Robert F. Coleman[111], a mathematician[112], 1954–2014[113], of United States[114], awarded the MacArthur Fellows Program[115], specialised in mathematics[116]; Ralph Greenberg[117], a mathematician[118], b. 1944[119], of United States[120], awarded the Fellow of the American Mathematical Society[121], specialised in mathematics[122]; John H. Smith[123], a mathematician[124], b. 2000[125], of United States[126], specialised in graph theory[127]; and Eugene M. Luks[128], a mathematician[129], b. 1940[130], of United States[131], awarded the Fellow of the American Mathematical Society[132], specialised in graph theory[133].

FAQs

Where was Kenkichi Iwasawa born?

Kenkichi Iwasawa's place of birth was Kiryū[2].

Where did Kenkichi Iwasawa die?

Kenkichi Iwasawa died in Tokyo[4].

What did Kenkichi Iwasawa do for work?

Kenkichi Iwasawa worked as mathematician[6] and university teacher[7].

Where did Kenkichi Iwasawa go to school?

Kenkichi Iwasawa was educated at University of Tokyo[18] and Musashi Junior & Senior High School[19].

What awards did Kenkichi Iwasawa receive?

Honors received include Guggenheim Fellowship[27], Cole Prize in Number Theory[79], Asahi Prize[82], and Fujihara Award[86].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [4] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  3. [9] ↑ . wikidata.org.
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  6. [18] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  7. [19] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  8. [12] ↑ . wikidata.org.
  9. [13] ↑ . smf.emath.fr. smf.emath.fr. Provenance: wikidata.org.
  10. [6] ↑ . wikidata.org.
  11. [7] ↑ . wikidata.org.
  12. [14] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  13. [15] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  14. [16] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  15. [17] ↑ . MacTutor History of Mathematics archive. ias.edu. Provenance: wikidata.org.
  16. [27] ↑ . wikidata.org.
  17. [79] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  18. [82] ↑ . wikidata.org.
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  20. [90] ↑ . MacTutor History of Mathematics archive. wikidata.org.
  21. [20] ↑ . wikidata.org.
  22. [53] ↑ . Mathematics Genealogy Project. wikidata.org.
  23. [59] ↑ . Mathematics Genealogy Project. wikidata.org.
  24. [65] ↑ . Mathematics Genealogy Project. wikidata.org.
  25. [70] ↑ . Mathematics Genealogy Project. wikidata.org.
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  29. [3] ↑ . MacTutor History of Mathematics archive. Retrieved . wikidata.org.
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Inverse relationships (entities pointing at this one)

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Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [8] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [99] ↑ . Wikidata sitelinks. wikidata.org.
  3. [100] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Kenkichi Iwasawa. Retrieved October 11, 2026, from https://4ort.xyz/entity/kenkichi-iwasawa
MLA “Kenkichi Iwasawa.” 4ort.xyz Knowledge Graph, 4ort.xyz, 11 Oct. 2026, https://4ort.xyz/entity/kenkichi-iwasawa.
BibTeX @misc{4ortxyz_kenkichi-iwasawa_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Kenkichi Iwasawa}}, year = {2026}, url = {https://4ort.xyz/entity/kenkichi-iwasawa}, note = {Accessed: 2026-10-11}}
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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 7d ago · Printstream · 2026-10-05 view diff on Wikidata ↗
    Place of death → Tokyo, Tokyo
    Wikipedia languages → ['ar', 'arz', 'ca', 'de', 'en', 'es', 'fa', 'fr', 'he', 'hu', 'it', 'ja', 'ko',
    Claims rich → —
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/57880|batch #57880]]: Import more precise places of birth, date from dewiki"
  2. 9w ago · Iamcarbon · 2026-08-05 view diff on Wikidata ↗
    Place of birth → Kiryū
    Employer → Princeton University, Massachusetts Institute of Technology, University of Tokyo +1
    Educated at → University of Tokyo, Musashi Junior & Senior High School
    Sex or gender → male
    + 26 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update-languages-short:0||ca, ja, mul */ Remove duplicate birth name aliases"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.