Productivity Rankings is a unique service offered only by “AD Scientific Index”. This is a ranking system derived from the i10 index in order to show the productivity of the scientist in publishing scientific articles of value. Productivity Rankings is an instrument that lists productive scientists in a given area, discipline, university, and country and can guide the development of meaningful incentives and academic policies. The world rankings, regional rankings, and university rankings of scientists in this table are developed based on the total i10 index. Additionally, click to view the special rankings based on Productivity Rankings: Scientists Last 6 years' i10 Index", Universities Total i10 Index Rankings 2025, Universities Last 6 Years i10 Index Rankings 2025 "Art and Humanities i10 Productivity Rankings" and "Social Sciences and Humanities i10 Productivity Rankings".
* Total i10 IndexRankings
Ranking Based On Selection :1
Geochemistry
Cosmochemistry
Petrology
Geophysics
Planetary Science
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
192
139
0.724
* Total i10 IndexRankings
Ranking Based On Selection :2
High pressure
Mineral physics
Planetary science
High-pressure mineral physics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
69
47
0.681
* Total i10 IndexRankings
Ranking Based On Selection :3
Earth science
Planetary science
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
54
41
0.759
* Total i10 IndexRankings
Ranking Based On Selection :4
Planetary Science
Mineralogy
Astrobiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
53
39
0.736
* Total i10 IndexRankings
Ranking Based On Selection :5
geochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
51
33
0.647
* Total i10 IndexRankings
Ranking Based On Selection :6
Geotechnical Engineering
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
9
0.391
* Total i10 IndexRankings
Ranking Based On Selection :7
Geology
Tectonics
Geochronology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
16
14
0.875
* Total i10 IndexRankings
Ranking Based On Selection :8
Metamorphic petrology
Stable isotopes
Geochemistry
Bio-geochemistry
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
1
1
1.000
* Total i10 IndexRankings
Ranking Based On Selection :9
Geotechnical Engineering、Uncertainty Quantification
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
1
1
1.000
* Total i10 IndexRankings
Ranking Based On Selection :10
Geochemistry
Isotopes
Petrology
Geology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
1
1
1.000
Eizo Nakamura
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
192
139
0.724
Geochemistry
Cosmochemistry
Petrology
Geophysics
Planetary Science
Hidenori Terasaki
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
69
47
0.681
High pressure
Mineral physics
Planetary science
High-pressure mineral physics
Katsura Kobayashi
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
54
41
0.759
Earth science
Planetary science
Matthew Izawa
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
53
39
0.736
Planetary Science
Mineralogy
Astrobiology
Hitoshi Chiba
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
51
33
0.647
Shin Ichi Nishimura
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
9
0.391
Takeshi Imayama
Okayama University of Science
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
16
14
0.875
Geology
Tectonics
Geochronology
Dilan M Ratnayake
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
1
1
1.000
Metamorphic petrology
Stable isotopes
Geochemistry
Bio-geochemistry
Menglu Huang
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
1
1
1.000
Geotechnical Engineering、Uncertainty Quantification
Nghiem Van Dao
Okayama University
Okayama, Japan
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
1
1
1.000
Geochemistry
Isotopes
Petrology
Geology