Citation Rankings
Highly Cited Researchers

Okayama University Highly Cited Researchers CitationEngineering & Technology / Earth Sciences Rankings (Sort by last 6 years Citation Index) 2025

Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation IndexUniversities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025

* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :1
Japan
Eizo Nakamura
Geochemistry
Cosmochemistry
Petrology
Geophysics
Planetary Science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,936
4,662
0.335
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :2
Japan
Matthew Izawa
Planetary Science
Mineralogy
Astrobiology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,807
1,805
0.643
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :3
Japan
Katsura Kobayashi
Earth science
Planetary science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,013
1,681
0.419
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :4
Japan
Hidenori Terasaki
High pressure
Mineral physics
Planetary science
High-pressure mineral physics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,491
1,382
0.396
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :5
Japan
Hitoshi Chiba
geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,523
1,300
0.287
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :6
Japan
Takeshi Imayama
Geology
Tectonics
Geochronology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
735
441
0.600
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :7
Japan
Shin Ichi Nishimura
Geotechnical Engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
870
388
0.446
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :8
Japan
Dilan M Ratnayake
Metamorphic petrology
Stable isotopes
Geochemistry
Bio-geochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
125
125
1.000
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :9
Japan
Menglu Huang
Geotechnical Engineering、Uncertainty Quantification
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26
26
1.000
* Last 6 Years Citation Counts Rankings
Ranking Based On Selection :10
Japan
Nghiem Van Dao
Geochemistry
Isotopes
Petrology
Geology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14
14
1.000
* Last 6 Years Citation Counts Rankings
Rankings
96,485
Japan
1,391
11
Ranking Based On Selection: 1
Eizo Nakamura
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,936
4,662
0.335
Geochemistry
Cosmochemistry
Petrology
Geophysics
Planetary Science
* Last 6 Years Citation Counts Rankings
Rankings
277,422
Japan
4,707
43
Ranking Based On Selection: 2
Matthew Izawa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,807
1,805
0.643
* Last 6 Years Citation Counts Rankings
Rankings
296,708
Japan
5,094
55
Ranking Based On Selection: 3
Katsura Kobayashi
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,013
1,681
0.419
* Last 6 Years Citation Counts Rankings
Rankings
354,047
Japan
6,236
66
Ranking Based On Selection: 4
Hidenori Terasaki
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,491
1,382
0.396
High pressure
Mineral physics
Planetary science
High-pressure mineral physics
* Last 6 Years Citation Counts Rankings
Rankings
373,221
Japan
6,626
75
Ranking Based On Selection: 5
Hitoshi Chiba
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,523
1,300
0.287
* Last 6 Years Citation Counts Rankings
Rankings
758,448
Japan
13,825
17
Ranking Based On Selection: 6
Takeshi Imayama
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
735
441
0.600
* Last 6 Years Citation Counts Rankings
Rankings
810,868
Japan
14,689
147
Ranking Based On Selection: 7
Shin Ichi Nishimura
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
870
388
0.446
* Last 6 Years Citation Counts Rankings
Rankings
1,324,235
Japan
22,521
220
Ranking Based On Selection: 8
Dilan M Ratnayake
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
125
125
1.000
Metamorphic petrology
Stable isotopes
Geochemistry
Bio-geochemistry
* Last 6 Years Citation Counts Rankings
Rankings
1,924,082
Japan
31,065
285
Ranking Based On Selection: 9
Menglu Huang
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26
26
1.000
Geotechnical Engineering、Uncertainty Quantification
* Last 6 Years Citation Counts Rankings
Rankings
2,076,833
Japan
33,298
304
Ranking Based On Selection: 10
Nghiem Van Dao
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14
14
1.000