{"id":"https://openalex.org/A5111885866","orcid":null,"observed_orcids":[],"display_name":"Masaaki Okuda","raw_author_names":["Masaaki Okuda","Okuda, Masaaki"],"full_name":"Okuda, Masaaki","works_count":28,"cited_by_count":541,"summary_stats":{"2yr_mean_citedness":0.0,"h_index":10,"i10_index":10},"ids":{"openalex":"https://openalex.org/A5111885866","orcid":null,"observed_orcids":[]},"affiliations":[{"institution":{"id":"https://openalex.org/I4210136414","ror":"https://ror.org/03esr8826","display_name":"Lake Biwa Museum","country_code":"JP","type":"archive","lineage":["https://openalex.org/I4210136414"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I4210163770","ror":"https://ror.org/053se7r61","display_name":"Natural History Museum and Institute","country_code":"JP","type":"archive","lineage":["https://openalex.org/I4210163770"]},"years":[2021,2018,2016,2015,2014,2012,2011,2010,2008,2007,2006,2002,2001,1999]},{"institution":{"id":"https://openalex.org/I6178835","ror":"https://ror.org/00sjd5653","display_name":"Ibaraki University","country_code":"JP","type":"education","lineage":["https://openalex.org/I6178835"]},"years":[2015]}],"last_known_institutions":[{"id":"https://openalex.org/I4210136414","ror":"https://ror.org/03esr8826","display_name":"Lake Biwa Museum","country_code":"JP","type":"archive","lineage":["https://openalex.org/I4210136414"]},{"id":"https://openalex.org/I4210163770","ror":"https://ror.org/053se7r61","display_name":"Natural History Museum and Institute","country_code":"JP","type":"archive","lineage":["https://openalex.org/I4210163770"]}],"topics":[{"id":"https://openalex.org/T10017","display_name":"Geology and Paleoclimatology Research","count":27,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric 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/T14047","display_name":"Marine and environmental studies","count":20,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"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/T10109","display_name":"Paleontology and Stratigraphy of Fossils","count":12,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"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/T13102","display_name":"Soil and Environmental Studies","count":6,"subfield":{"id":"https://openalex.org/subfields/1111","display_name":"Soil 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/T11594","display_name":"Tree-ring climate responses","count":5,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric 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"}}],"topic_share":[{"id":"https://openalex.org/T14047","display_name":"Marine and environmental studies","value":7.26e-05,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"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/T11594","display_name":"Tree-ring climate responses","value":4.82e-05,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric 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/T10017","display_name":"Geology and Paleoclimatology Research","value":3.48e-05,"subfield":{"id":"https://openalex.org/subfields/1902","display_name":"Atmospheric 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/T13102","display_name":"Soil and Environmental Studies","value":2.2e-05,"subfield":{"id":"https://openalex.org/subfields/1111","display_name":"Soil 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/T10109","display_name":"Paleontology and Stratigraphy of Fossils","value":1.73e-05,"subfield":{"id":"https://openalex.org/subfields/1911","display_name":"Paleontology"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"2780618852","wikidata":"https://www.wikidata.org/wiki/Q79932","display_name":"Pollen","score":0.9142063856124878},{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.892121434211731},{"id":"151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","score":0.6901311278343201},{"id":"205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","score":0.6645069122314453},{"id":"86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","score":0.22115418314933777}],"counts_by_year":[{"year":1997,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1999,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2001,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2006,"works_count":3,"oa_works_count":3,"cited_by_count":0},{"year":2007,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2008,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2010,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2011,"works_count":4,"oa_works_count":4,"cited_by_count":0},{"year":2012,"works_count":1,"oa_works_count":0,"cited_by_count":26},{"year":2013,"works_count":0,"oa_works_count":0,"cited_by_count":13},{"year":2014,"works_count":2,"oa_works_count":1,"cited_by_count":20},{"year":2015,"works_count":2,"oa_works_count":1,"cited_by_count":22},{"year":2016,"works_count":1,"oa_works_count":0,"cited_by_count":18},{"year":2017,"works_count":1,"oa_works_count":0,"cited_by_count":23},{"year":2018,"works_count":3,"oa_works_count":1,"cited_by_count":19},{"year":2019,"works_count":0,"oa_works_count":0,"cited_by_count":28},{"year":2020,"works_count":0,"oa_works_count":0,"cited_by_count":44},{"year":2021,"works_count":1,"oa_works_count":1,"cited_by_count":52},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":61},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":25},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":30},{"year":2025,"works_count":0,"oa_works_count":0,"cited_by_count":29},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":22}],"display_name_alternatives":["Masaaki Okuda","Okuda, Masaaki"],"block_key":"m okuda","works_api_url":"https://api.openalex.org/works?filter=author.id:A5111885866","awards_count":2,"awards_api_url":"https://api.openalex.org/awards?filter=investigators.author.id:A5111885866","updated_date":"2026-11-12T13:17:38","created_date":"2016-06-24T00:00:00"}