{"id":"https://openalex.org/A5083000807","orcid":null,"observed_orcids":[],"display_name":"Tsutomu Koizumi","raw_author_names":["T Koizumi","T. Koizumi","Tsutomu KOIZUMI","Tsutomu Koizumi"],"full_name":"Koizumi, Tsutomu","works_count":63,"cited_by_count":568,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":13,"i10_index":19},"ids":{"openalex":"https://openalex.org/A5083000807","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I135598925","ror":"https://ror.org/00p4k0j84","display_name":"Kyushu University","country_code":"JP","type":"education","lineage":["https://openalex.org/I135598925"]},"years":[2015,2014]},{"institution":{"id":"https://openalex.org/I163770644","ror":"https://ror.org/02pc6pc55","display_name":"Okayama University","country_code":"JP","type":"education","lineage":["https://openalex.org/I163770644"]},"years":[2018]},{"institution":{"id":"https://openalex.org/I220323382","ror":"https://ror.org/02h39wj34","display_name":"Showa Corporation","country_code":"JP","type":"company","lineage":["https://openalex.org/I220323382"]},"years":[2015]},{"institution":{"id":"https://openalex.org/I4210144711","ror":"https://ror.org/04048e026","display_name":"International Superconductivity Technology Center","country_code":"JP","type":"facility","lineage":["https://openalex.org/I4210144711"]},"years":[2015]},{"institution":{"id":"https://openalex.org/I4405274237","ror":"https://ror.org/01asbnt17","display_name":"Showa Electric WIRE Cable Co., Ltd. (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4405274237"]},"years":[2005,2003,2002,2001,2000,1999,1998,1997,1996,1994,1993]}],"last_known_institutions":[{"id":"https://openalex.org/I163770644","ror":"https://ror.org/02pc6pc55","display_name":"Okayama University","country_code":"JP","type":"education","lineage":["https://openalex.org/I163770644"]}],"topics":[{"id":"https://openalex.org/T10037","display_name":"Physics of Superconductivity and Magnetism","count":61,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11808","display_name":"Superconducting Materials and Applications","count":59,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12491","display_name":"Superconductivity in MgB2 and Alloys","count":24,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11367","display_name":"Particle accelerators and beam dynamics","count":10,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11803","display_name":"Superconducting and THz Device Technology","count":10,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T12491","display_name":"Superconductivity in MgB2 and Alloys","value":0.000759,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11808","display_name":"Superconducting Materials and Applications","value":0.0002396,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10037","display_name":"Physics of Superconductivity and Magnetism","value":0.0001114,"subfield":{"id":"https://openalex.org/subfields/3104","display_name":"Condensed Matter Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11803","display_name":"Superconducting and THz Device Technology","value":8.55e-05,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12588","display_name":"Electronic and Structural Properties of Oxides","value":2.56e-05,"subfield":{"id":"https://openalex.org/subfields/2505","display_name":"Materials Chemistry"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.8927807211875916},{"id":"54101563","wikidata":"https://www.wikidata.org/wiki/Q124131","display_name":"Superconductivity","score":0.7604097127914429},{"id":"159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","score":0.7136847972869873},{"id":"26873012","wikidata":"https://www.wikidata.org/wiki/Q214781","display_name":"Condensed matter physics","score":0.5509110689163208},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.4459708333015442}],"counts_by_year":[{"year":1993,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":7,"oa_works_count":0,"cited_by_count":0},{"year":1996,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1997,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":12,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":8,"oa_works_count":1,"cited_by_count":0},{"year":2001,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2003,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2005,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2009,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2010,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2012,"works_count":1,"oa_works_count":1,"cited_by_count":26},{"year":2013,"works_count":1,"oa_works_count":0,"cited_by_count":21},{"year":2014,"works_count":2,"oa_works_count":1,"cited_by_count":7},{"year":2015,"works_count":2,"oa_works_count":1,"cited_by_count":21},{"year":2016,"works_count":2,"oa_works_count":1,"cited_by_count":25},{"year":2017,"works_count":1,"oa_works_count":0,"cited_by_count":21},{"year":2018,"works_count":2,"oa_works_count":1,"cited_by_count":19},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":22},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":14},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":11},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":6},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":13},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":13},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":13},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":5}],"display_name_alternatives":["T Koizumi","T. Koizumi","Tsutomu KOIZUMI","Tsutomu Koizumi"],"block_key":"t koizumi","works_api_url":"https://api.openalex.org/works?filter=author.id:A5083000807","awards_count":0,"updated_date":"2026-11-08T12:57:04","created_date":"2016-06-24T00:00:00"}
