{"id":"https://openalex.org/A5046467597","orcid":"https://orcid.org/0000-0001-7140-7244","observed_orcids":["https://orcid.org/0000-0001-7140-7244"],"display_name":"Takashi Koyama","raw_author_names":["Koyama, Takashi","T. Koyama","TAKASHI KOYAMA","Takashi KOYAMA","Takashi Koyama"],"full_name":"Takashi Koyama (417981)","works_count":49,"cited_by_count":984,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":16,"i10_index":27},"ids":{"openalex":"https://openalex.org/A5046467597","orcid":"https://orcid.org/0000-0001-7140-7244","observed_orcids":["https://orcid.org/0000-0001-7140-7244"]},"affiliations":[{"institution":{"id":"https://openalex.org/I104946051","ror":"https://ror.org/05jk51a88","display_name":"Nihon University","country_code":"JP","type":"education","lineage":["https://openalex.org/I104946051"]},"years":[2006,2002,2001,2000,1999,1998,1997,1995,1994,1993,1992,1991,1985,1964,1963,1962,1961]},{"institution":{"id":"https://openalex.org/I150468666","ror":"https://ror.org/03czfpz43","display_name":"Emory University","country_code":"US","type":"education","lineage":["https://openalex.org/I150468666"]},"years":[2015]},{"institution":{"id":"https://openalex.org/I36296616","ror":"https://ror.org/01mrvbd33","display_name":"Hoshi University","country_code":"JP","type":"education","lineage":["https://openalex.org/I36296616"]},"years":[1997]},{"institution":{"id":"https://openalex.org/I4405287676","ror":"https://ror.org/05vm6d733","display_name":"Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, The University of Tokyo","country_code":"JP","type":"facility","lineage":["https://openalex.org/I4405287676","https://openalex.org/I74801974"]},"years":[2019]},{"institution":{"id":"https://openalex.org/I48840829","ror":"https://ror.org/048nxq511","display_name":"Tokyo University of Marine Science and Technology","country_code":"JP","type":"education","lineage":["https://openalex.org/I48840829"]},"years":[2017,2015,2014,2013,2012,2010,2009,2007,2006,2005]},{"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":[2020,2019,2018]}],"last_known_institutions":[{"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"]}],"topics":[{"id":"https://openalex.org/T11617","display_name":"Enzyme Production and Characterization","count":13,"subfield":{"id":"https://openalex.org/subfields/1305","display_name":"Biotechnology"},"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/T10521","display_name":"RNA and protein synthesis mechanisms","count":12,"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/T10506","display_name":"Aquaculture disease management and microbiota","count":8,"subfield":{"id":"https://openalex.org/subfields/2403","display_name":"Immunology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11505","display_name":"Reproductive biology and impacts on aquatic species","count":7,"subfield":{"id":"https://openalex.org/subfields/1314","display_name":"Physiology"},"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/T10434","display_name":"Chromosomal and Genetic Variations","count":6,"subfield":{"id":"https://openalex.org/subfields/1311","display_name":"Genetics"},"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"}}],"topic_share":[{"id":"https://openalex.org/T13362","display_name":"Slime Mold and Myxomycetes Research","value":8.34e-05,"subfield":{"id":"https://openalex.org/subfields/1105","display_name":"Ecology, Evolution, Behavior and Systematics"},"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/T11403","display_name":"Invertebrate Immune Response Mechanisms","value":6.52e-05,"subfield":{"id":"https://openalex.org/subfields/2403","display_name":"Immunology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T12477","display_name":"Toxin Mechanisms and Immunotoxins","value":5.19e-05,"subfield":{"id":"https://openalex.org/subfields/2403","display_name":"Immunology"},"field":{"id":"https://openalex.org/fields/24","display_name":"Immunology and Microbiology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T11142","display_name":"Advanced Glycation End Products research","value":4.74e-05,"subfield":{"id":"https://openalex.org/subfields/1308","display_name":"Clinical 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/T11085","display_name":"Fungal Biology and Applications","value":4.54e-05,"subfield":{"id":"https://openalex.org/subfields/2736","display_name":"Pharmacology (medical)"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"x_concepts":[{"id":"86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","score":0.9722731709480286},{"id":"185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","score":0.9550549387931824},{"id":"54355233","wikidata":"https://www.wikidata.org/wiki/Q7162","display_name":"Genetics","score":0.7100539207458496},{"id":"55493867","wikidata":"https://www.wikidata.org/wiki/Q7094","display_name":"Biochemistry","score":0.6844794750213623},{"id":"104317684","wikidata":"https://www.wikidata.org/wiki/Q7187","display_name":"Gene","score":0.5412660837173462}],"counts_by_year":[{"year":1961,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1962,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1963,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1964,"works_count":3,"oa_works_count":3,"cited_by_count":0},{"year":1968,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1972,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1984,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1985,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1991,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1992,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1993,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1994,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1995,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1997,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":1998,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2000,"works_count":3,"oa_works_count":0,"cited_by_count":0},{"year":2001,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2002,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2005,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2006,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2007,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2009,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2010,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":1,"oa_works_count":0,"cited_by_count":21},{"year":2013,"works_count":1,"oa_works_count":1,"cited_by_count":25},{"year":2014,"works_count":2,"oa_works_count":2,"cited_by_count":34},{"year":2015,"works_count":3,"oa_works_count":2,"cited_by_count":28},{"year":2016,"works_count":0,"oa_works_count":0,"cited_by_count":37},{"year":2017,"works_count":1,"oa_works_count":0,"cited_by_count":49},{"year":2018,"works_count":1,"oa_works_count":1,"cited_by_count":52},{"year":2019,"works_count":4,"oa_works_count":4,"cited_by_count":48},{"year":2020,"works_count":1,"oa_works_count":1,"cited_by_count":48},{"year":2021,"works_count":0,"oa_works_count":0,"cited_by_count":58},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":65},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":64},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":56},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":52},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":27}],"display_name_alternatives":["Koyama, Takashi","T. Koyama","TAKASHI KOYAMA","Takashi KOYAMA","Takashi Koyama"],"block_key":"t koyama","works_api_url":"https://api.openalex.org/works?filter=author.id:A5046467597","awards_count":4,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5046467597","updated_date":"2026-11-12T13:17:38","created_date":"2016-06-24T00:00:00"}