{"id":"https://openalex.org/A5047037474","orcid":"https://orcid.org/0000-0002-7826-4802","observed_orcids":["https://orcid.org/0000-0002-7826-4802"],"display_name":"Ryozo Kitajima","raw_author_names":["Kitajima, Ryozo","Ryozo KITAJIMA","Ryozo Kitajima","\u5317\u5cf6, \u826f\u4e09"],"full_name":"Kitajima, Ryozo","works_count":44,"cited_by_count":73,"summary_stats":{"2yr_mean_citedness":0.6,"h_index":5,"i10_index":2},"ids":{"openalex":"https://openalex.org/A5047037474","orcid":"https://orcid.org/0000-0002-7826-4802","observed_orcids":["https://orcid.org/0000-0002-7826-4802"]},"affiliations":[{"institution":{"id":"https://openalex.org/I1314466530","ror":"https://ror.org/01p7qe739","display_name":"Tokai University","country_code":"JP","type":"education","lineage":["https://openalex.org/I1314466530"]},"years":[2022,2016,2015,2007,2006]},{"institution":{"id":"https://openalex.org/I31618427","ror":"https://ror.org/035kpke84","display_name":"Tokyo Polytechnic University","country_code":"JP","type":"education","lineage":["https://openalex.org/I31618427"]},"years":[2025,2024,2023,2022,2021,2020]},{"institution":{"id":"https://openalex.org/I6030618","ror":"https://ror.org/03ptaj492","display_name":"Seikei University","country_code":"JP","type":"education","lineage":["https://openalex.org/I6030618"]},"years":[2019,2018]},{"institution":{"id":"https://openalex.org/I74801974","ror":"https://ror.org/057zh3y96","display_name":"The University of Tokyo","country_code":"JP","type":"education","lineage":["https://openalex.org/I74801974"]},"years":[2019]}],"last_known_institutions":[{"id":"https://openalex.org/I31618427","ror":"https://ror.org/035kpke84","display_name":"Tokyo Polytechnic University","country_code":"JP","type":"education","lineage":["https://openalex.org/I31618427"]}],"topics":[{"id":"https://openalex.org/T10320","display_name":"Neural Networks and Applications","count":16,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10159","display_name":"Ionosphere and magnetosphere dynamics","count":10,"subfield":{"id":"https://openalex.org/subfields/1912","display_name":"Space and Planetary Science"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10251","display_name":"Solar and Space Plasma Dynamics","count":10,"subfield":{"id":"https://openalex.org/subfields/3103","display_name":"Astronomy and Astrophysics"},"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/T11786","display_name":"Geomagnetism and Paleomagnetism Studies","count":9,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13083","display_name":"Advanced Text Analysis Techniques","count":9,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T13083","display_name":"Advanced Text Analysis Techniques","value":9.99e-05,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12676","display_name":"Machine Learning and ELM","value":5.69e-05,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11786","display_name":"Geomagnetism and Paleomagnetism Studies","value":5.57e-05,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13794","display_name":"Financial Reporting and XBRL","value":4.92e-05,"subfield":{"id":"https://openalex.org/subfields/1404","display_name":"Management Information Systems"},"field":{"id":"https://openalex.org/fields/14","display_name":"Business, Management and Accounting"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T12072","display_name":"Machine Learning and Algorithms","value":4.72e-05,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","score":0.8414635062217712},{"id":"50644808","wikidata":"https://www.wikidata.org/wiki/Q192776","display_name":"Artificial neural network","score":0.7632731199264526},{"id":"154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","score":0.6651026010513306},{"id":"119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","score":0.5921687483787537},{"id":"33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","score":0.32857048511505127}],"counts_by_year":[{"year":2006,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2008,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2014,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2015,"works_count":4,"oa_works_count":1,"cited_by_count":2},{"year":2016,"works_count":3,"oa_works_count":0,"cited_by_count":19},{"year":2017,"works_count":1,"oa_works_count":1,"cited_by_count":5},{"year":2018,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2019,"works_count":10,"oa_works_count":5,"cited_by_count":2},{"year":2020,"works_count":2,"oa_works_count":1,"cited_by_count":2},{"year":2021,"works_count":1,"oa_works_count":1,"cited_by_count":5},{"year":2022,"works_count":8,"oa_works_count":6,"cited_by_count":10},{"year":2023,"works_count":1,"oa_works_count":0,"cited_by_count":6},{"year":2024,"works_count":2,"oa_works_count":2,"cited_by_count":11},{"year":2025,"works_count":3,"oa_works_count":3,"cited_by_count":3},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":7}],"display_name_alternatives":["Kitajima, Ryozo","Ryozo KITAJIMA","Ryozo Kitajima","\u5317\u5cf6, \u826f\u4e09"],"block_key":"r kitajima","works_api_url":"https://api.openalex.org/works?filter=author.id:A5047037474","awards_count":0,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5047037474","updated_date":"2026-11-12T13:17:38","created_date":"2016-06-24T00:00:00"}