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” (1,121,296 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
Naoto Umezawa
First-principles calculations
photocatalysis
oxides
defect
Metrics
 
H-Index
i10 Index
Citation
43
111
13,917
* Rankings
Ranking Based On Selection: 6
Tomoyuki Ogata
Photochemistry
Electrochemistry
Electronic device
Metrics
 
H-Index
i10 Index
Citation
19
23
1,434
* Rankings
Ranking Based On Selection: 7
Hidenori Nakayama
organic electronics
flexible electronics
perovskite solar cell
Metrics
 
H-Index
i10 Index
Citation
12
13
662
Sayed Zaman
Water Corrosion and Preventio
Metrics
 
H-Index
i10 Index
Citation
1
0
4
Rankings
Ranking Based On Selection: 1
Naoto Umezawa
Metrics
 
H-Index
i10 Index
Citation Counts
43
111
13,917
First-principles calculations
photocatalysis
oxides
defect
Rankings
Ranking Based On Selection: 2
Masayoshi Mikami
Metrics
 
H-Index
i10 Index
Citation Counts
31
51
7,870
Rankings
Ranking Based On Selection: 4
takahiko hayakawa
Metrics
 
H-Index
i10 Index
Citation Counts
23
27
3,591
Rankings
Ranking Based On Selection: 5
Fumihiko Shimizu
Metrics
 
H-Index
i10 Index
Citation Counts
21
28
1,670
Rankings
Ranking Based On Selection: 6
Tomoyuki Ogata
Metrics
 
H-Index
i10 Index
Citation Counts
19
23
1,434
Rankings
Ranking Based On Selection: 7
Hidenori Nakayama
Metrics
 
H-Index
i10 Index
Citation Counts
12
13
662
Rankings
Ranking Based On Selection: 8
Sayed Zaman
Metrics
 
H-Index
i10 Index
Citation Counts
1
0
4
Water Corrosion and Preventio