Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,690 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection: 1
Toshio Yamagata; 山形俊男
Climate Dynamics
Physical Oceanography
Dynamic Meteorology
Geophysical Fluid Dynamics
Metrics
H-Index
i10 Index
Citation
102
252
44,924
* Rankings
Ranking Based On Selection: 2
Ken Takai
Geobiology
Microbiology
Astrobiology
Origin of Life
Environmental Microbiology
Metrics
H-Index
i10 Index
Citation
91
301
28,019
* Rankings
Ranking Based On Selection: 3
Fumio Inagaki
geomicrobiology
biogeochemistry
microbial ecology
geobiotechnology
sustainability science
Metrics
H-Index
i10 Index
Citation
67
164
15,193
* Rankings
Ranking Based On Selection: 7
Prabir K Patra
Greenhouse gases
atmospheric processes
climate variations
Metrics
H-Index
i10 Index
Citation
59
160
19,127
* Rankings
Ranking Based On Selection: 8
Taira, Asahiko
Geology
Paleoceanography
Deep-sea Drilling
Anthropocene
Metrics
H-Index
i10 Index
Citation
57
137
11,135

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* Rankings
Ranking Based On Selection: 11
Hiroyuki Imachi
Environmental Microbiology
Applied Microbiology
Metrics
H-Index
i10 Index
Citation
53
96
8,955
* Rankings
Ranking Based On Selection: 13
Yugo Kanaya
Atmospheric Chemistry
Optical measurements
reactive gases
radicals
aerosols
Metrics
H-Index
i10 Index
Citation
52
137
8,139
* Rankings
Ranking Based On Selection: 18
Yoshinori Takano
Organic Molecule
Organic Geochemistry
Amino Acids & Chirality
Earth & Planetary Science
Metrics
H-Index
i10 Index
Citation
43
120
7,414
* Rankings
Ranking Based On Selection: 33
Hisako Hirayama
Environmental Microbiology
Methane oxidation
Microbial Ecology
Metrics
H-Index
i10 Index
Citation
37
50
5,275
* Rankings
Ranking Based On Selection: 39
Hiromi Kayama Watanabe
Larval dispersal
settlement
population connectiviity
Metrics
H-Index
i10 Index
Citation
33
87
3,455
* Rankings
Ranking Based On Selection: 44
Shigeru Deguchi
Soft Materials
White Nanobiotechnology
Biomimetics
Extremophiles
Fullerenes
Metrics
H-Index
i10 Index
Citation
31
53
4,237
* Rankings
Ranking Based On Selection: 47
Shuichi Mori
Tropical Meteorology
Mesoscale Meteorology
Radar Meteorology
Monsoon Climatology
Metrics
H-Index
i10 Index
Citation
30
51
2,841
* Rankings
Ranking Based On Selection: 53
Chong Chen
Deep Sea
Biodiversity
Mollusca
Evolution
Systematics and Taxonomy
Metrics
H-Index
i10 Index
Citation
28
69
2,687
* Rankings
Ranking Based On Selection: 63
Takuma Miyakawa
Atmospheric chemistry
Atmospheric environment
Aerosol measurements
Metrics
H-Index
i10 Index
Citation
27
45
2,819
* Rankings
Ranking Based On Selection: 75
Ingo Richter
tropical air-sea interaction
tropical Atlantic
tropical basin interaction
Metrics
H-Index
i10 Index
Citation
25
38
3,344
* Rankings
Ranking Based On Selection: 76
Takeshi Doi
Seasonal prediction
air-sea interaction
Indian Ocean Dipole
El Nino
Metrics
H-Index
i10 Index
Citation
25
45
1,910
* Rankings
Ranking Based On Selection: 81
Jv Ratnam
Climate Variability
Regional Modeling
Indian monsoon
Machine learning
Metrics
H-Index
i10 Index
Citation
24
34
1,789
* Rankings
Ranking Based On Selection: 82
Kentaro Ando
海洋物理、大気海洋相互作用
Metrics
H-Index
i10 Index
Citation
24
49
2,743
* Rankings
Ranking Based On Selection: 83
Takafumi Kasaya
Magnetotelluric survey
geophysical exploration
side scan sonar
bathymetric survey
Metrics
H-Index
i10 Index
Citation
24
37
1,971
* Rankings
Ranking Based On Selection: 90
Ettore Barbieri
Biomaterials
Fracture Mechanics
Percolation Theory
Granular Materials
Electrical Conductivity
Metrics
H-Index
i10 Index
Citation
23
39
1,408
* Rankings
Ranking Based On Selection: 91
Yusuke Tsukatani
Photosynthesis
Anoxygenic photosynthetic bacteria
Bacteriochlorophyll
Pigment biosynthesis
Reaction centers
Metrics
H-Index
i10 Index
Citation
23
37
1,279
* Rankings
Ranking Based On Selection: 92
Naveen Chandra
Carbon cycle
Greenhouse Gases
Inverse modeling
Isotope modelling
Carbon-Climate Feedbacks
Metrics
H-Index
i10 Index
Citation
22
33
10,344
* Rankings
Ranking Based On Selection: 94
Eko Siswanto
Ocean remote sensing
Ocean color
Climate change
Ocean acidification
Land-ocean-atmosphere interactions
Metrics
H-Index
i10 Index
Citation
22
34
1,556
* Rankings
Ranking Based On Selection: 96
熊谷英憲
海洋底科学、地球進化論、年代測定学、
Metrics
H-Index
i10 Index
Citation
22
31
1,631
* Rankings
Ranking Based On Selection: 97
Hidenori Kumagai
noble gases
seafloor geophysics
submarine volcano
hydrothermal system
mass spectrometry
Metrics
H-Index
i10 Index
Citation
22
31
1,615
Rankings
Ranking Based On Selection: 1
Toshio Yamagata; 山形俊男
Metrics
H-Index
i10 Index
Citation Counts
102
252
44,924
Climate Dynamics
Physical Oceanography
Dynamic Meteorology
Geophysical Fluid Dynamics
Rankings
Ranking Based On Selection: 2
Ken Takai
Metrics
H-Index
i10 Index
Citation Counts
91
301
28,019
Geobiology
Microbiology
Astrobiology
Origin of Life
Environmental Microbiology
Rankings
Ranking Based On Selection: 3
Fumio Inagaki
Metrics
H-Index
i10 Index
Citation Counts
67
164
15,193
geomicrobiology
biogeochemistry
microbial ecology
geobiotechnology
sustainability science
Rankings
Ranking Based On Selection: 4
Naohiko Ohkouchi
Metrics
H-Index
i10 Index
Citation Counts
62
202
13,279
Rankings
Ranking Based On Selection: 5
Shuichi Kodaira
Metrics
H-Index
i10 Index
Citation Counts
61
194
12,381
Rankings
Ranking Based On Selection: 6
Swadhin Behera
Metrics
H-Index
i10 Index
Citation Counts
60
155
17,958
Rankings
Ranking Based On Selection: 7
Prabir K Patra
Metrics
H-Index
i10 Index
Citation Counts
59
160
19,127
Greenhouse gases
atmospheric processes
climate variations
Rankings
Ranking Based On Selection: 8
Taira, Asahiko
Metrics
H-Index
i10 Index
Citation Counts
57
137
11,135
Geology
Paleoceanography
Deep-sea Drilling
Anthropocene
Rankings
Ranking Based On Selection: 9
Katsuhiko Suzuki
Metrics
H-Index
i10 Index
Citation Counts
56
210
10,987
Rankings
Ranking Based On Selection: 10
Takuro Nunoura
Metrics
H-Index
i10 Index
Citation Counts
53
127
11,163

Enroll all your faculty members with discounted institutional membership to showcase your institution's academic strength to the world in the best way possible – join now and achieve results fast! 

Rankings
Ranking Based On Selection: 11
Hiroyuki Imachi
Metrics
H-Index
i10 Index
Citation Counts
53
96
8,955
Environmental Microbiology
Applied Microbiology
Rankings
Ranking Based On Selection: 12
Shingo Watanabe
Metrics
H-Index
i10 Index
Citation Counts
52
123
12,697
Rankings
Ranking Based On Selection: 13
Yugo Kanaya
Metrics
H-Index
i10 Index
Citation Counts
52
137
8,139
Atmospheric Chemistry
Optical measurements
reactive gases
radicals
aerosols
Rankings
Ranking Based On Selection: 14
Takayuki Ushikubo
Metrics
H-Index
i10 Index
Citation Counts
45
90
6,723
Rankings
Ranking Based On Selection: 15
Kentaro Nakamura
Metrics
H-Index
i10 Index
Citation Counts
45
120
7,551
Rankings
Ranking Based On Selection: 16
Takehiro Hirose
Metrics
H-Index
i10 Index
Citation Counts
45
96
7,684
Rankings
Ranking Based On Selection: 17
Yosuke Kawahito
Metrics
H-Index
i10 Index
Citation Counts
43
114
6,468
Rankings
Ranking Based On Selection: 18
Yoshinori Takano
Metrics
H-Index
i10 Index
Citation Counts
43
120
7,414
Organic Molecule
Organic Geochemistry
Amino Acids & Chirality
Earth & Planetary Science
Rankings
Ranking Based On Selection: 20
Kiyoshi Suyehiro
Metrics
H-Index
i10 Index
Citation Counts
43
97
7,163
Rankings
Ranking Based On Selection: 21
Yuichi Nogi
Metrics
H-Index
i10 Index
Citation Counts
42
87
5,893
Rankings
Ranking Based On Selection: 23
Hideki Kobayashi
Metrics
H-Index
i10 Index
Citation Counts
41
74
7,198
Rankings
Ranking Based On Selection: 24
Yuki Morono
Metrics
H-Index
i10 Index
Citation Counts
41
88
6,509
Rankings
Ranking Based On Selection: 25
Masataka Kinoshita
Metrics
H-Index
i10 Index
Citation Counts
41
113
5,733
Rankings
Ranking Based On Selection: 26
Fujikura, Kastsunori
Metrics
H-Index
i10 Index
Citation Counts
40
133
5,600
Rankings
Ranking Based On Selection: 27
Muneo Hori
Metrics
H-Index
i10 Index
Citation Counts
40
136
12,286
Rankings
Ranking Based On Selection: 28
Nana Ogawa|Nanako O. Ogawa, Nanako Ogawa
Metrics
H-Index
i10 Index
Citation Counts
39
105
6,750
Rankings
Ranking Based On Selection: 29
Naotaka Tomioka|富岡尚敬
Metrics
H-Index
i10 Index
Citation Counts
38
99
6,139
Mineralogy
Meteoritics
High-Pressure Research
Electron Microscopy
Rankings
Ranking Based On Selection: 30
Akinori Ito
Metrics
H-Index
i10 Index
Citation Counts
37
56
5,548
Rankings
Ranking Based On Selection: 32
Masayuki Miyazaki
Metrics
H-Index
i10 Index
Citation Counts
37
67
5,529
Environmental Microbiology
Rankings
Ranking Based On Selection: 33
Hisako Hirayama
Metrics
H-Index
i10 Index
Citation Counts
37
50
5,275
Environmental Microbiology
Methane oxidation
Microbial Ecology
Rankings
Ranking Based On Selection: 35
Shinsuke Kawagucci|川口 慎介
Metrics
H-Index
i10 Index
Citation Counts
34
56
2,857
Deep-sea exploration
Biogeochemistry
Isotope Geochemistry
Rankings
Ranking Based On Selection: 36
Tsuyoshi Ishikawa
Metrics
H-Index
i10 Index
Citation Counts
34
62
5,165
Rankings
Ranking Based On Selection: 37
Yoshihiko Tamura
Metrics
H-Index
i10 Index
Citation Counts
34
62
3,853
Rankings
Ranking Based On Selection: 38
Motoo Ito
Metrics
H-Index
i10 Index
Citation Counts
33
70
6,154
Isotope cosmochemistry
mass spectrometry
SIMS
Rankings
Ranking Based On Selection: 39
Hiromi Kayama Watanabe
Metrics
H-Index
i10 Index
Citation Counts
33
87
3,455
Larval dispersal
settlement
population connectiviity
Rankings
Ranking Based On Selection: 40
Shunichi Ishii
Metrics
H-Index
i10 Index
Citation Counts
33
39
5,787
Microbial ecology
Microbial genomics
Electromicrobiology
Rankings
Ranking Based On Selection: 41
Yoshio Kawatani
Metrics
H-Index
i10 Index
Citation Counts
32
51
4,323
Rankings
Ranking Based On Selection: 42
Takazo Shibuya
Metrics
H-Index
i10 Index
Citation Counts
32
66
3,598
Geology
Geochemistry
Mineralogy
Petrology
Astrobiology
Rankings
Ranking Based On Selection: 43
Dhugal Lindsay
Metrics
H-Index
i10 Index
Citation Counts
31
84
3,597
Rankings
Ranking Based On Selection: 44
Shigeru Deguchi
Metrics
H-Index
i10 Index
Citation Counts
31
53
4,237
Soft Materials
White Nanobiotechnology
Biomimetics
Extremophiles
Fullerenes
Rankings
Ranking Based On Selection: 45
Wataru Tanikawa
Metrics
H-Index
i10 Index
Citation Counts
31
57
3,319
earth science
earthquake
hydrology
geoarchaeology
Rankings
Ranking Based On Selection: 46
Takashi Toyofuku
Metrics
H-Index
i10 Index
Citation Counts
30
67
3,020
Rankings
Ranking Based On Selection: 47
Shuichi Mori
Metrics
H-Index
i10 Index
Citation Counts
30
51
2,841
Tropical Meteorology
Mesoscale Meteorology
Radar Meteorology
Monsoon Climatology
Rankings
Ranking Based On Selection: 48
Keiko Takahashi
Metrics
H-Index
i10 Index
Citation Counts
30
55
3,482
Rankings
Ranking Based On Selection: 49
Takeshi Hanyu
Metrics
H-Index
i10 Index
Citation Counts
29
53
2,856
Rankings
Ranking Based On Selection: 50
Yasuhiro Yamada
Metrics
H-Index
i10 Index
Citation Counts
29
79
4,052
Subsurface exploration
Energy transition
Mantle and Space
Rankings
Ranking Based On Selection: 51
Toru Miyama
Metrics
H-Index
i10 Index
Citation Counts
29
44
3,194
Rankings
Ranking Based On Selection: 52
Masayuki Obayashi
Metrics
H-Index
i10 Index
Citation Counts
29
43
6,678
Rankings
Ranking Based On Selection: 53
Chong Chen
Metrics
H-Index
i10 Index
Citation Counts
28
69
2,687
Deep Sea
Biodiversity
Mollusca
Evolution
Systematics and Taxonomy
Rankings
Ranking Based On Selection: 54
Takeshi Iinuma
Metrics
H-Index
i10 Index
Citation Counts
28
41
3,505
Rankings
Ranking Based On Selection: 55
Akiko Makabe
Metrics
H-Index
i10 Index
Citation Counts
28
37
2,365
Rankings
Ranking Based On Selection: 56
Tatsuhiko Hoshino
Metrics
H-Index
i10 Index
Citation Counts
28
42
3,005
Rankings
Ranking Based On Selection: 57
Natsue Abe
Metrics
H-Index
i10 Index
Citation Counts
28
71
3,600
Rankings
Ranking Based On Selection: 58
Ayako Nakanishi
Metrics
H-Index
i10 Index
Citation Counts
28
41
2,473
Rankings
Ranking Based On Selection: 61
Akinori Yabuki
Metrics
H-Index
i10 Index
Citation Counts
27
49
1,966
Rankings
Ranking Based On Selection: 62
Taichi Yokokawa
Metrics
H-Index
i10 Index
Citation Counts
27
42
2,268
Rankings
Ranking Based On Selection: 63
Takuma Miyakawa
Metrics
H-Index
i10 Index
Citation Counts
27
45
2,819
Atmospheric chemistry
Atmospheric environment
Aerosol measurements
Rankings
Ranking Based On Selection: 64
Shigenobu Hirose
Metrics
H-Index
i10 Index
Citation Counts
27
41
3,049
Rankings
Ranking Based On Selection: 65
Kunio Yoneyama
Metrics
H-Index
i10 Index
Citation Counts
27
50
2,811
Rankings
Ranking Based On Selection: 66
Seiji Tsuboi
Metrics
H-Index
i10 Index
Citation Counts
27
48
2,561
Rankings
Ranking Based On Selection: 67
Shingo Kato
Metrics
H-Index
i10 Index
Citation Counts
26
39
1,801
Rankings
Ranking Based On Selection: 68
Manabu Nishizawa
Metrics
H-Index
i10 Index
Citation Counts
26
38
1,922
Rankings
Ranking Based On Selection: 69
Hidetaka Nomaki
Metrics
H-Index
i10 Index
Citation Counts
26
50
2,354
Rankings
Ranking Based On Selection: 70
Masashi Tsuchiya
Metrics
H-Index
i10 Index
Citation Counts
26
50
2,143
Rankings
Ranking Based On Selection: 71
Junichi Miyazaki
Metrics
H-Index
i10 Index
Citation Counts
26
41
3,139
Rankings
Ranking Based On Selection: 72
Shigeru Shimamura
Metrics
H-Index
i10 Index
Citation Counts
26
38
2,762
Rankings
Ranking Based On Selection: 74
Kenji Shimizu
Metrics
H-Index
i10 Index
Citation Counts
25
40
1,899
Rankings
Ranking Based On Selection: 75
Ingo Richter
Metrics
H-Index
i10 Index
Citation Counts
25
38
3,344
tropical air-sea interaction
tropical Atlantic
tropical basin interaction
Rankings
Ranking Based On Selection: 76
Takeshi Doi
Metrics
H-Index
i10 Index
Citation Counts
25
45
1,910
Seasonal prediction
air-sea interaction
Indian Ocean Dipole
El Nino
Rankings
Ranking Based On Selection: 78
Ryota Nakajima
Metrics
H-Index
i10 Index
Citation Counts
25
39
1,503
Coral Reef
the Deep-Sea
Zooplankton
Coral mucus
Marine litter
Rankings
Ranking Based On Selection: 79
Gou Fujie
Metrics
H-Index
i10 Index
Citation Counts
25
52
2,279
Rankings
Ranking Based On Selection: 80
Miho Hirai
Metrics
H-Index
i10 Index
Citation Counts
24
37
1,844
Rankings
Ranking Based On Selection: 81
Jv Ratnam
Metrics
H-Index
i10 Index
Citation Counts
24
34
1,789
Climate Variability
Regional Modeling
Indian monsoon
Machine learning
Rankings
Ranking Based On Selection: 82
Kentaro Ando
Metrics
H-Index
i10 Index
Citation Counts
24
49
2,743
海洋物理、大気海洋相互作用
Rankings
Ranking Based On Selection: 83
Takafumi Kasaya
Metrics
H-Index
i10 Index
Citation Counts
24
37
1,971
Magnetotelluric survey
geophysical exploration
side scan sonar
bathymetric survey
Rankings
Ranking Based On Selection: 84
Satoru Tanaka
Metrics
H-Index
i10 Index
Citation Counts
24
36
2,486
Rankings
Ranking Based On Selection: 85
Moe Kyaw
Metrics
H-Index
i10 Index
Citation Counts
24
35
1,383
Marine geology and geophysics
petrophysics
drilling engineering
Rankings
Ranking Based On Selection: 86
Yusuke Kubo
Metrics
H-Index
i10 Index
Citation Counts
23
57
2,274
Rankings
Ranking Based On Selection: 87
S.Lan Smith
Metrics
H-Index
i10 Index
Citation Counts
23
43
2,287
Rankings
Ranking Based On Selection: 88
Masahiro Yamamoto
Metrics
H-Index
i10 Index
Citation Counts
23
41
2,015
Biochemistry
Microbiology
Electrochemistry
Astrobiology
Rankings
Ranking Based On Selection: 89
Yohei Hamada
Metrics
H-Index
i10 Index
Citation Counts
23
48
1,899
Rankings
Ranking Based On Selection: 90
Ettore Barbieri
Metrics
H-Index
i10 Index
Citation Counts
23
39
1,408
Biomaterials
Fracture Mechanics
Percolation Theory
Granular Materials
Electrical Conductivity
Rankings
Ranking Based On Selection: 91
Yusuke Tsukatani
Metrics
H-Index
i10 Index
Citation Counts
23
37
1,279
Photosynthesis
Anoxygenic photosynthetic bacteria
Bacteriochlorophyll
Pigment biosynthesis
Reaction centers
Rankings
Ranking Based On Selection: 92
Naveen Chandra
Metrics
H-Index
i10 Index
Citation Counts
22
33
10,344
Carbon cycle
Greenhouse Gases
Inverse modeling
Isotope modelling
Carbon-Climate Feedbacks
Rankings
Ranking Based On Selection: 93
Kaoru Tachiiri
Metrics
H-Index
i10 Index
Citation Counts
22
38
3,470
Rankings
Ranking Based On Selection: 94
Eko Siswanto
Metrics
H-Index
i10 Index
Citation Counts
22
34
1,556
Ocean remote sensing
Ocean color
Climate change
Ocean acidification
Land-ocean-atmosphere interactions
Rankings
Ranking Based On Selection: 95
Yohei Yamada
Metrics
H-Index
i10 Index
Citation Counts
22
30
2,042
Rankings
Ranking Based On Selection: 96
熊谷英憲
Metrics
H-Index
i10 Index
Citation Counts
22
31
1,631
海洋底科学、地球進化論、年代測定学、
Rankings
Ranking Based On Selection: 97
Hidenori Kumagai
Metrics
H-Index
i10 Index
Citation Counts
22
31
1,615
noble gases
seafloor geophysics
submarine volcano
hydrothermal system
mass spectrometry
Rankings
Ranking Based On Selection: 100
Norio Kitadai
Metrics
H-Index
i10 Index
Citation Counts
21
30
1,790