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 rankings in world, region, country, and university are in Beta version and are subject to real-time updates, since the subject field “Others” (1,121,291 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded. These rankings will dynamically evolve in real time as the “Others” profiles are revised and classified. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection: 1
Donald Tryk
Electrochemistry
Photocatalysis
Photoelectrochemistry
Fuel cell
Metrics
 
H-Index
i10 Index
Citation
85
235
42,678
* Rankings
Ranking Based On Selection: 4
Schuichi Koizumi
glia
astrocyte
microglia
purinergic
Ca2
Metrics
 
H-Index
i10 Index
Citation
59
154
16,725
* Rankings
Ranking Based On Selection: 9
Hiroshi Irie
photocatalysis
thermoelectricit
Metrics
 
H-Index
i10 Index
Citation
43
82
17,202
* Rankings
Ranking Based On Selection: 12
Ryutarou Ohbuchi (大渕 竜太郎)
Computer science
multimedia retrieval
machine learning
digital watermarking
geometric modelin
Metrics
 
H-Index
i10 Index
Citation
38
82
8,381
* Rankings
Ranking Based On Selection: 13
Kazuo Kitamura
Neurophysiology
Neuroscience
Biophysic
Metrics
 
H-Index
i10 Index
Citation
36
49
6,165
* Rankings
Ranking Based On Selection: 15
Toshihiro Miyao
Catalysis
Energy and fuels
Nano materials
Fuel Cells
Hydrogen productio
Metrics
 
H-Index
i10 Index
Citation
36
72
3,768
* Rankings
Ranking Based On Selection: 16
Masanori Nagao
Superconductivity
Crystal growt
Metrics
 
H-Index
i10 Index
Citation
33
93
4,179
* Rankings
Ranking Based On Selection: 18
Kyoichiro Tsuchiya
Diabetes
Obesity
Atherosclerosi
Metrics
 
H-Index
i10 Index
Citation
30
39
2,708
* Rankings
Ranking Based On Selection: 20
Lee Chuin Chen
Mass Spectrometry
Analytical Instrument
Electrospra
Metrics
 
H-Index
i10 Index
Citation
29
73
2,634
* Rankings
Ranking Based On Selection: 21
Huy Gia Vuong
Surgical Pathology
Neuropathology
Molecular Pathology
Thyroid Cancers
Head and Neck Patholog
Metrics
 
H-Index
i10 Index
Citation
28
53
2,195
* Rankings
Ranking Based On Selection: 22
Youichi Shinozaki
神経科学、細胞生物学、ナノバイオロジー、分析化�
Metrics
 
H-Index
i10 Index
Citation
28
48
3,712
* Rankings
Ranking Based On Selection: 23
Tomoya Iwata
aquatic ecology
limnology
biogeochemistry
food web
Metrics
 
H-Index
i10 Index
Citation
28
46
3,516
Rankings
Ranking Based On Selection: 1
Donald Tryk
Metrics
 
H-Index
i10 Index
Citation Counts
85
235
42,678
Electrochemistry
Photocatalysis
Photoelectrochemistry
Fuel cell
Rankings
Ranking Based On Selection: 2
Keiji Miyazawa
Metrics
 
H-Index
i10 Index
Citation Counts
64
129
15,884
Rankings
Ranking Based On Selection: 3
Atsuhito Nakao
Metrics
 
H-Index
i10 Index
Citation Counts
61
139
17,884
Rankings
Ranking Based On Selection: 4
Schuichi Koizumi
Metrics
 
H-Index
i10 Index
Citation Counts
59
154
16,725
glia
astrocyte
microglia
purinergic
Ca2
Rankings
Ranking Based On Selection: 5
Satoshi Wada
Metrics
 
H-Index
i10 Index
Citation Counts
53
183
10,581
Rankings
Ranking Based On Selection: 6
Eiji Haramoto
Metrics
 
H-Index
i10 Index
Citation Counts
47
115
9,255
Rankings
Ranking Based On Selection: 7
Kenji Kashiwagi
Metrics
 
H-Index
i10 Index
Citation Counts
47
125
6,873
Rankings
Ranking Based On Selection: 8
Nobuhiro Kumada
Metrics
 
H-Index
i10 Index
Citation Counts
44
191
7,657
Rankings
Ranking Based On Selection: 9
Hiroshi Irie
Metrics
 
H-Index
i10 Index
Citation Counts
43
82
17,202
Rankings
Ranking Based On Selection: 10
Takashi Kohda
Metrics
 
H-Index
i10 Index
Citation Counts
42
65
7,545
Rankings
Ranking Based On Selection: 11
Tetsuo Kondo
Metrics
 
H-Index
i10 Index
Citation Counts
39
96
5,776
Rankings
Ranking Based On Selection: 12
Ryutarou Ohbuchi (大渕 竜太郎)
Metrics
 
H-Index
i10 Index
Citation Counts
38
82
8,381
Computer science
multimedia retrieval
machine learning
digital watermarking
geometric modelin
Rankings
Ranking Based On Selection: 13
Kazuo Kitamura
Metrics
 
H-Index
i10 Index
Citation Counts
36
49
6,165
Rankings
Ranking Based On Selection: 14
Keita Kirito
Metrics
 
H-Index
i10 Index
Citation Counts
36
69
4,301
Rankings
Ranking Based On Selection: 15
Toshihiro Miyao
Metrics
 
H-Index
i10 Index
Citation Counts
36
72
3,768
Catalysis
Energy and fuels
Nano materials
Fuel Cells
Hydrogen productio
Rankings
Ranking Based On Selection: 16
Masanori Nagao
Metrics
 
H-Index
i10 Index
Citation Counts
33
93
4,179
Rankings
Ranking Based On Selection: 17
Shunji Suzuki
Metrics
 
H-Index
i10 Index
Citation Counts
31
69
2,824
Rankings
Ranking Based On Selection: 18
Kyoichiro Tsuchiya
Metrics
 
H-Index
i10 Index
Citation Counts
30
39
2,708
Diabetes
Obesity
Atherosclerosi
Rankings
Ranking Based On Selection: 19
Hiroshi Yokomichi
Metrics
 
H-Index
i10 Index
Citation Counts
29
72
3,131
Rankings
Ranking Based On Selection: 20
Lee Chuin Chen
Metrics
 
H-Index
i10 Index
Citation Counts
29
73
2,634
Mass Spectrometry
Analytical Instrument
Electrospra
Rankings
Ranking Based On Selection: 21
Huy Gia Vuong
Metrics
 
H-Index
i10 Index
Citation Counts
28
53
2,195
Surgical Pathology
Neuropathology
Molecular Pathology
Thyroid Cancers
Head and Neck Patholog
Rankings
Ranking Based On Selection: 22
Youichi Shinozaki
Metrics
 
H-Index
i10 Index
Citation Counts
28
48
3,712
神経科学、細胞生物学、ナノバイオロジー、分析化�
Rankings
Ranking Based On Selection: 23
Tomoya Iwata
Metrics
 
H-Index
i10 Index
Citation Counts
28
46
3,516
aquatic ecology
limnology
biogeochemistry
food web
Rankings
Ranking Based On Selection: 24
Sarmila Tandukar
Metrics
 
H-Index
i10 Index
Citation Counts
27
52
6,163
Rankings
Ranking Based On Selection: 25
Takahiro Segawa
Metrics
 
H-Index
i10 Index
Citation Counts
27
48
2,549