{"id":"https://openalex.org/A5020530883","orcid":"https://orcid.org/0000-0001-7489-1262","observed_orcids":["https://orcid.org/0000-0001-7489-1262"],"display_name":"Masao Iwai","raw_author_names":["Iwai, Masao","M. Iwai","Masao Iwai"],"full_name":"Iwai, Masao","works_count":122,"cited_by_count":1726,"summary_stats":{"2yr_mean_citedness":2.7333333333333334,"h_index":20,"i10_index":29},"ids":{"openalex":"https://openalex.org/A5020530883","orcid":"https://orcid.org/0000-0001-7489-1262","observed_orcids":["https://orcid.org/0000-0001-7489-1262"]},"affiliations":[{"institution":{"id":"https://openalex.org/I116953780","ror":"https://ror.org/03rc6as71","display_name":"Tongji University","country_code":"CN","type":"education","lineage":["https://openalex.org/I116953780"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I1315852903","ror":"https://ror.org/059qg2m13","display_name":"Japan Agency for Marine-Earth Science and Technology","country_code":"JP","type":"facility","lineage":["https://openalex.org/I1315852903"]},"years":[2025,2013]},{"institution":{"id":"https://openalex.org/I1337471766","ror":"https://ror.org/03qyr1v70","display_name":"Wadia Institute of Himalayan Geology","country_code":"IN","type":"facility","lineage":["https://openalex.org/I1337471766","https://openalex.org/I2799351866","https://openalex.org/I4210098748","https://openalex.org/I4210134808"]},"years":[2017]},{"institution":{"id":"https://openalex.org/I134820265","ror":"https://ror.org/02gfc7t72","display_name":"Consejo Superior de Investigaciones Cient\u00edficas","country_code":"ES","type":"government","lineage":["https://openalex.org/I134820265"]},"years":[2013]},{"institution":{"id":"https://openalex.org/I173304897","ror":"https://ror.org/04njjy449","display_name":"Universidad de Granada","country_code":"ES","type":"education","lineage":["https://openalex.org/I173304897"]},"years":[2013]},{"institution":{"id":"https://openalex.org/I191429286","ror":"https://ror.org/00yh3cz06","display_name":"Sam Houston State University","country_code":"US","type":"education","lineage":["https://openalex.org/I191429286"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I201537933","ror":"https://ror.org/01dq60k83","display_name":"Tohoku University","country_code":"JP","type":"education","lineage":["https://openalex.org/I201537933"]},"years":[1995]},{"institution":{"id":"https://openalex.org/I201954162","ror":"https://ror.org/02v1sf687","display_name":"University of Kochi","country_code":"JP","type":"education","lineage":["https://openalex.org/I201954162","https://openalex.org/I4405286278"]},"years":[2025,2019,2018,2016,2015,2014,2013,2012,2011,2009,2008,2006,2002,2000]},{"institution":{"id":"https://openalex.org/I2801351115","ror":"https://ror.org/0067dvq63","display_name":"Government of New South Wales","country_code":"AU","type":"government","lineage":["https://openalex.org/I2801351115"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I4210095677","ror":"https://ror.org/00v0g9w49","display_name":"Instituto Andaluz de Ciencias de la Tierra","country_code":"ES","type":"facility","lineage":["https://openalex.org/I134820265","https://openalex.org/I4210095677"]},"years":[2013]},{"institution":{"id":"https://openalex.org/I4210154444","ror":"https://ror.org/05a18r864","display_name":"International Ocean Discovery Program","country_code":"NO","type":"other","lineage":["https://openalex.org/I4210154444"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I4391767744","ror":"https://ror.org/02bxj9z30","display_name":"State Key Laboratory of Marine Geology","country_code":"CN","type":"facility","lineage":["https://openalex.org/I116953780","https://openalex.org/I4391767744"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I4405286696","ror":"https://ror.org/02tydr441","display_name":"Marine Core Research Institute, Kochi University","country_code":"JP","type":"facility","lineage":["https://openalex.org/I4405286696","https://openalex.org/I77063589"]},"years":[2026,2025,2018,2016]},{"institution":{"id":"https://openalex.org/I77063589","ror":"https://ror.org/01xxp6985","display_name":"K\u014dchi University","country_code":"JP","type":"education","lineage":["https://openalex.org/I77063589"]},"years":[2026,2025,2019,2018,2016,2015,2014,2013,2012,2011,2009,2008,2006,2002,2001,2000]},{"institution":{"id":"https://openalex.org/I897542642","ror":"https://ror.org/008n7pv89","display_name":"University of Plymouth","country_code":"GB","type":"education","lineage":["https://openalex.org/I897542642"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I91045830","ror":"https://ror.org/01f5ytq51","display_name":"Texas A&M University","country_code":"US","type":"education","lineage":["https://openalex.org/I91045830"]},"years":[2021]}],"last_known_institutions":[{"id":"https://openalex.org/I4405286696","ror":"https://ror.org/02tydr441","display_name":"Marine Core Research Institute, Kochi University","country_code":"JP","type":"facility","lineage":["https://openalex.org/I4405286696","https://openalex.org/I77063589"]},{"id":"https://openalex.org/I77063589","ror":"https://ror.org/01xxp6985","display_name":"K\u014dchi University","country_code":"JP","type":"education","lineage":["https://openalex.org/I77063589"]}],"topics":[{"id":"https://openalex.org/T10017","display_name":"Geology and Paleoclimatology Research","count":76,"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/T10109","display_name":"Paleontology and Stratigraphy of Fossils","count":60,"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/T10965","display_name":"Geological formations and processes","count":50,"subfield":{"id":"https://openalex.org/subfields/1904","display_name":"Earth-Surface Processes"},"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/T13177","display_name":"Geological and Geophysical Studies","count":48,"subfield":{"id":"https://openalex.org/subfields/1907","display_name":"Geology"},"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/T10644","display_name":"Cryospheric studies and observations","count":19,"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/T11786","display_name":"Geomagnetism and Paleomagnetism Studies","value":0.0001176,"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/T10017","display_name":"Geology and Paleoclimatology Research","value":9.8e-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/T10109","display_name":"Paleontology and Stratigraphy of Fossils","value":8.67e-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"}},{"id":"https://openalex.org/T13177","display_name":"Geological and Geophysical Studies","value":7.4e-05,"subfield":{"id":"https://openalex.org/subfields/1907","display_name":"Geology"},"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/T10644","display_name":"Cryospheric studies and observations","value":7.05e-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"}}],"x_concepts":[{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.9509106874465942},{"id":"151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","score":0.8553122282028198},{"id":"111368507","wikidata":"https://www.wikidata.org/wiki/Q43518","display_name":"Oceanography","score":0.7828669548034668},{"id":"205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","score":0.6108489036560059},{"id":"41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","score":0.39434558153152466}],"counts_by_year":[{"year":1973,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":1992,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":1995,"works_count":3,"oa_works_count":2,"cited_by_count":0},{"year":1997,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":1998,"works_count":3,"oa_works_count":2,"cited_by_count":0},{"year":1999,"works_count":2,"oa_works_count":2,"cited_by_count":0},{"year":2000,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2001,"works_count":2,"oa_works_count":0,"cited_by_count":0},{"year":2002,"works_count":13,"oa_works_count":8,"cited_by_count":0},{"year":2006,"works_count":4,"oa_works_count":2,"cited_by_count":0},{"year":2007,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2008,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2009,"works_count":3,"oa_works_count":2,"cited_by_count":0},{"year":2010,"works_count":3,"oa_works_count":1,"cited_by_count":0},{"year":2011,"works_count":6,"oa_works_count":2,"cited_by_count":0},{"year":2012,"works_count":10,"oa_works_count":6,"cited_by_count":41},{"year":2013,"works_count":9,"oa_works_count":5,"cited_by_count":48},{"year":2014,"works_count":5,"oa_works_count":1,"cited_by_count":79},{"year":2015,"works_count":3,"oa_works_count":2,"cited_by_count":85},{"year":2016,"works_count":10,"oa_works_count":4,"cited_by_count":86},{"year":2017,"works_count":2,"oa_works_count":1,"cited_by_count":111},{"year":2018,"works_count":1,"oa_works_count":1,"cited_by_count":125},{"year":2019,"works_count":2,"oa_works_count":1,"cited_by_count":138},{"year":2020,"works_count":2,"oa_works_count":0,"cited_by_count":100},{"year":2021,"works_count":16,"oa_works_count":16,"cited_by_count":178},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":108},{"year":2023,"works_count":0,"oa_works_count":0,"cited_by_count":102},{"year":2024,"works_count":0,"oa_works_count":0,"cited_by_count":110},{"year":2025,"works_count":14,"oa_works_count":13,"cited_by_count":121},{"year":2026,"works_count":1,"oa_works_count":1,"cited_by_count":73}],"display_name_alternatives":["Iwai, Masao","M. Iwai","Masao Iwai"],"block_key":"m iwai","works_api_url":"https://api.openalex.org/works?filter=author.id:A5020530883","awards_count":0,"updated_date":"2026-11-09T14:06:01","created_date":"2016-06-24T00:00:00"}