{"id":"https://openalex.org/A5111424936","orcid":null,"observed_orcids":[],"display_name":"Toshimasa Toyo\u2019oka","raw_author_names":["TOSHIMASA TOYO'OKA","TOSHIMASA TOYOOKA","Toshimasa TOYO'OKA","Toshimasa TOYO\u2019OKA","Toshimasa Toyo'Oka","Toshimasa Toyo'oka","Toshimasa Toyooka","Toshimasa Toyo\u2018oka","Toshimasa Toyo\u2019Oka","Toshimasa Toyo\u2019oka","Toshimasa Toyo\u2032oka","Toshimasa. Toyo'oka","Toshimasa. Toyooka","Toyo'oka Toshimasa"],"full_name":"Toshimasa Toyo\u2019oka","works_count":318,"cited_by_count":9228,"summary_stats":{"2yr_mean_citedness":3.0,"h_index":52,"i10_index":222},"ids":{"openalex":"https://openalex.org/A5111424936","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I1298590031","ror":"https://ror.org/01w6wtk13","display_name":"Shizuoka University","country_code":"JP","type":"education","lineage":["https://openalex.org/I1298590031"]},"years":[2025,2024,2023,2022,2021,2020,2019,2018,2017,2016,2015,2014,2013,2012,2011,2010,2009,2008,2007,2006,2005,2004,2003,2002,2001,2000,1999,1998,1997,1996,1995,1994]},{"institution":{"id":"https://openalex.org/I143698483","ror":"https://ror.org/02yypjn06","display_name":"Hiroshima Jogakuin University","country_code":"JP","type":"education","lineage":["https://openalex.org/I143698483"]},"years":[1998]},{"institution":{"id":"https://openalex.org/I146416000","ror":"https://ror.org/001tmjg57","display_name":"University of Kansas","country_code":"US","type":"education","lineage":["https://openalex.org/I146416000"]},"years":[1993]},{"institution":{"id":"https://openalex.org/I150240954","ror":"https://ror.org/04rvw0k47","display_name":"University of Shizuoka","country_code":"JP","type":"education","lineage":["https://openalex.org/I150240954"]},"years":[2025,2024,2023,2022,2021,2020,2019,2018,2017,2016,2015,2014,2013,2012,2011,2010,2009,2008,2007,2006,2005,2004,2003,2002,2001,2000,1999,1998,1997,1996,1995,1994]},{"institution":{"id":"https://openalex.org/I150993360","ror":"https://ror.org/03natb733","display_name":"Hamamatsu Photonics (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I150993360"]},"years":[1989]},{"institution":{"id":"https://openalex.org/I18562188","ror":"https://ror.org/03bktwf13","display_name":"Aichi Gakusen University","country_code":"JP","type":"education","lineage":["https://openalex.org/I18562188"]},"years":[2003]},{"institution":{"id":"https://openalex.org/I200641316","ror":"https://ror.org/04bcbax71","display_name":"Musashino University","country_code":"JP","type":"education","lineage":["https://openalex.org/I200641316"]},"years":[2005]},{"institution":{"id":"https://openalex.org/I4210086780","ror":"https://ror.org/00097mb19","display_name":"Japan Science and Technology Agency","country_code":"JP","type":"government","lineage":["https://openalex.org/I1319490839","https://openalex.org/I4210086780"]},"years":[2005,2004,2003]},{"institution":{"id":"https://openalex.org/I4210151964","ror":"https://ror.org/04s629c33","display_name":"National Institute of Health Sciences","country_code":"JP","type":"facility","lineage":["https://openalex.org/I1333985979","https://openalex.org/I4210151964"]},"years":[1994,1993,1992,1991,1989,1988,1987]},{"institution":{"id":"https://openalex.org/I4405275449","ror":"https://ror.org/03mtmdx77","display_name":"Nippon Starch Chemical Co., Ltd. (Japan)","country_code":"JP","type":"company","lineage":["https://openalex.org/I4405275449"]},"years":[2004]},{"institution":{"id":"https://openalex.org/I64189623","ror":"https://ror.org/00f2txz25","display_name":"Kitasato University","country_code":"JP","type":"education","lineage":["https://openalex.org/I64189623"]},"years":[2005]},{"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":[2008,2007,1989,1988,1987,1986,1985,1984,1983]},{"institution":{"id":"https://openalex.org/I97018004","ror":"https://ror.org/00f54p054","display_name":"Stanford University","country_code":"US","type":"education","lineage":["https://openalex.org/I97018004"]},"years":[2004]}],"last_known_institutions":[{"id":"https://openalex.org/I1298590031","ror":"https://ror.org/01w6wtk13","display_name":"Shizuoka University","country_code":"JP","type":"education","lineage":["https://openalex.org/I1298590031"]},{"id":"https://openalex.org/I150240954","ror":"https://ror.org/04rvw0k47","display_name":"University of Shizuoka","country_code":"JP","type":"education","lineage":["https://openalex.org/I150240954"]}],"topics":[{"id":"https://openalex.org/T10908","display_name":"Analytical Chemistry and Chromatography","count":169,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11460","display_name":"Analytical Methods in Pharmaceuticals","count":94,"subfield":{"id":"https://openalex.org/subfields/1602","display_name":"Analytical Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10836","display_name":"Metabolomics and Mass Spectrometry Studies","count":63,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10683","display_name":"Mass Spectrometry Techniques and Applications","count":61,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10013","display_name":"Asymmetric Synthesis and Catalysis","count":38,"subfield":{"id":"https://openalex.org/subfields/1605","display_name":"Organic Chemistry"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T13871","display_name":"Melamine detection and toxicity","value":0.0003966,"subfield":{"id":"https://openalex.org/subfields/1106","display_name":"Food Science"},"field":{"id":"https://openalex.org/fields/11","display_name":"Agricultural and Biological Sciences"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10836","display_name":"Metabolomics and Mass Spectrometry Studies","value":0.0003398,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10908","display_name":"Analytical Chemistry and Chromatography","value":0.000337,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11481","display_name":"Sulfur Compounds in Biology","value":0.0003115,"subfield":{"id":"https://openalex.org/subfields/1303","display_name":"Biochemistry"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10683","display_name":"Mass Spectrometry Techniques and Applications","value":0.0002088,"subfield":{"id":"https://openalex.org/subfields/1607","display_name":"Spectroscopy"},"field":{"id":"https://openalex.org/fields/16","display_name":"Chemistry"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","score":0.9942386150360107},{"id":"43617362","wikidata":"https://www.wikidata.org/wiki/Q170050","display_name":"Chromatography","score":0.9180835485458374},{"id":"179998833","wikidata":"https://www.wikidata.org/wiki/Q381233","display_name":"High-performance liquid chromatography","score":0.7841901183128357},{"id":"55493867","wikidata":"https://www.wikidata.org/wiki/Q7094","display_name":"Biochemistry","score":0.5727035999298096},{"id":"178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","score":0.5376125574111938}],"counts_by_year":[{"year":1975,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1981,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1983,"works_count":4,"oa_works_count":1,"cited_by_count":0},{"year":1984,"works_count":5,"oa_works_count":0,"cited_by_count":0},{"year":1985,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1986,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1987,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":1988,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":1989,"works_count":10,"oa_works_count":1,"cited_by_count":0},{"year":1991,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":1992,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1993,"works_count":4,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":9,"oa_works_count":1,"cited_by_count":0},{"year":1995,"works_count":6,"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":4,"oa_works_count":0,"cited_by_count":0},{"year":1998,"works_count":7,"oa_works_count":3,"cited_by_count":0},{"year":1999,"works_count":8,"oa_works_count":1,"cited_by_count":0},{"year":2000,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":7,"oa_works_count":1,"cited_by_count":0},{"year":2002,"works_count":11,"oa_works_count":2,"cited_by_count":0},{"year":2003,"works_count":8,"oa_works_count":0,"cited_by_count":0},{"year":2004,"works_count":12,"oa_works_count":0,"cited_by_count":0},{"year":2005,"works_count":12,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":9,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":16,"oa_works_count":1,"cited_by_count":0},{"year":2008,"works_count":13,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":12,"oa_works_count":1,"cited_by_count":0},{"year":2010,"works_count":13,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":9,"oa_works_count":2,"cited_by_count":0},{"year":2012,"works_count":10,"oa_works_count":1,"cited_by_count":438},{"year":2013,"works_count":18,"oa_works_count":3,"cited_by_count":383},{"year":2014,"works_count":14,"oa_works_count":1,"cited_by_count":359},{"year":2015,"works_count":15,"oa_works_count":3,"cited_by_count":396},{"year":2016,"works_count":13,"oa_works_count":2,"cited_by_count":475},{"year":2017,"works_count":15,"oa_works_count":4,"cited_by_count":438},{"year":2018,"works_count":5,"oa_works_count":2,"cited_by_count":366},{"year":2019,"works_count":10,"oa_works_count":3,"cited_by_count":395},{"year":2020,"works_count":4,"oa_works_count":2,"cited_by_count":353},{"year":2021,"works_count":1,"oa_works_count":0,"cited_by_count":375},{"year":2022,"works_count":2,"oa_works_count":1,"cited_by_count":339},{"year":2023,"works_count":3,"oa_works_count":2,"cited_by_count":277},{"year":2024,"works_count":3,"oa_works_count":3,"cited_by_count":263},{"year":2025,"works_count":2,"oa_works_count":1,"cited_by_count":258},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":174}],"display_name_alternatives":["TOSHIMASA TOYO'OKA","TOSHIMASA TOYOOKA","Toshimasa TOYO'OKA","Toshimasa TOYO\u2019OKA","Toshimasa Toyo'Oka","Toshimasa Toyo'oka","Toshimasa Toyooka","Toshimasa Toyo\u2018oka","Toshimasa Toyo\u2019Oka","Toshimasa Toyo\u2019oka","Toshimasa Toyo\u2032oka","Toshimasa. Toyo'oka","Toshimasa. Toyooka","Toyo'oka Toshimasa"],"block_key":"t toyooka","works_api_url":"https://api.openalex.org/works?filter=author.id:A5111424936","updated_date":"2026-11-01T12:26:46","created_date":"2016-06-24T00:00:00"}