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" (1,014,167 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
Tohru Nakashizuka
forest ecology
forest management
forest dynamics
climate change
biodiversity
Metrics
H-Index
i10 Index
Citation
60
168
17,599
* Rankings
Ranking Based On Selection :4
Takahiro Noda
potato
sweetpotato
buckwheat
starch
carbohydrates
Metrics
H-Index
i10 Index
Citation
55
123
8,445
* Rankings
Ranking Based On Selection :7
Matthias Wissuwa
Plant Breeding
Physiology
Genetics
Abiotic Stress Tolerance
Nutrient Efficiency
Metrics
H-Index
i10 Index
Citation
51
94
10,210
* Rankings
Ranking Based On Selection :9
Subbarao Guntur
Nitrification inhibition
Biological nitrification inhibition
nitrous oxide emissions
global warming
climate change
Metrics
H-Index
i10 Index
Citation
48
82
9,288
* Rankings
Ranking Based On Selection :11
Shigemi Seo
植物生理学、植物病理学、環境保全、病害虫防除、天然物化学
Metrics
H-Index
i10 Index
Citation
44
68
7,679
* Rankings
Ranking Based On Selection :19
Takeshi Tokida
Free-Air CO2 Enrichment (FACE)
Stable Isotope Biogeochemistry
Plant-soil-microbe interactions
Rice
Methane
Metrics
H-Index
i10 Index
Citation
37
65
3,779
* Rankings
Ranking Based On Selection :22
Kenji Saitoh
ichthyology
fisheries
molecular phylogeny
aquatic biology
freshwater fish
Metrics
H-Index
i10 Index
Citation
36
68
5,862
* Rankings
Ranking Based On Selection :23
Hiroaki Ichikawa
植物科学、植物分子生物学、分子遺伝学、バイオテクノロジー
Metrics
H-Index
i10 Index
Citation
36
54
4,131
* Rankings
Ranking Based On Selection :24
Takahide Kagawa
Shinrin-yoku Forest Therapy Forest Medicine stress reduction Forest landscape planning Five sense stimulation Regional promotion Preventive Medicine Medical Tourism psychological benefits Coexisting with COVID-19
Metrics
H-Index
i10 Index
Citation
35
47
11,314
* Rankings
Ranking Based On Selection :25
Ronald C Estoque
Forestry
Land Change Science
CC Mitigation/Adaptation
GIS/Remote Sensing
Sustainability Science
Metrics
H-Index
i10 Index
Citation
35
59
5,580
* Rankings
Ranking Based On Selection :26
Shigehiko Urawa
salmon biology
fish parasite
disease
Metrics
H-Index
i10 Index
Citation
35
107
4,010
* Rankings
Ranking Based On Selection :31
Toshiaki Takezawa
tissue engineering
regenerative medicine
pharmacokinetics
toxicity
Metrics
H-Index
i10 Index
Citation
32
67
3,454
* Rankings
Ranking Based On Selection :32
Yusaku Uga
root system architecture
drought resistance
rice
QTL cloning
root phenotyping
Metrics
H-Index
i10 Index
Citation
31
47
4,818
* Rankings
Ranking Based On Selection :33
Yuichi Yamaura
landscape ecology
conservation biology
forest management
Metrics
H-Index
i10 Index
Citation
31
81
4,387
* Rankings
Ranking Based On Selection :34
Takahiro Kikawada
Anhydrobiosis
Desiccation tolerance
Trehalose
LEA proteins
Transporters
Metrics
H-Index
i10 Index
Citation
31
54
3,737
* Rankings
Ranking Based On Selection :35
Nanko, Kazuki
Raindrop
Ecohydrology
Soil erosion
ecomechanics
instrumentation
Metrics
H-Index
i10 Index
Citation
30
55
2,872
* Rankings
Ranking Based On Selection :42
Shoichiro Yamamoto
salmonids
population genetics
fisheries
conservation biology
conservation genetics
Metrics
H-Index
i10 Index
Citation
28
62
3,275
* Rankings
Ranking Based On Selection :57
Hideki Takami
Fisheries
Marine biology
Larval ecology
Benthic invertebrates
Metrics
H-Index
i10 Index
Citation
26
43
1,905
* Rankings
Ranking Based On Selection :58
Hideaki Oike
Chrononutrition
hearing loss
Ageing
Taste
Metrics
H-Index
i10 Index
Citation
25
36
2,524
* Rankings
Ranking Based On Selection :60
Toshiyuki Takai
Rice yield potential
photosynthesis
shoot branching
Metrics
H-Index
i10 Index
Citation
24
34
4,040
* Rankings
Ranking Based On Selection :61
Taketoshi Kodama
Chemical Oceanography
Biological Oceanography
Fisheries Oceanography
Marine Ecology
Metrics
H-Index
i10 Index
Citation
24
39
1,584
* Rankings
Ranking Based On Selection :62
Ken Naito
genetics
genomics
genus Vigna
food security
stress tolerance
Metrics
H-Index
i10 Index
Citation
24
34
3,664
* Rankings
Ranking Based On Selection :66
Qingmin Han
Tree Physiology
Forest Ecology
Mast seeding
Stress Physiology
Resource dynamics
Metrics
H-Index
i10 Index
Citation
24
35
2,178
* Rankings
Ranking Based On Selection :70
Yasuhiro Usui
Rice
Climate change
Free-Air CO2 Enrichment (FACE)
Paddy Field
Division of Farming System Research
Metrics
H-Index
i10 Index
Citation
23
33
3,164
* Rankings
Ranking Based On Selection :72
Kotaro Konno
Plant-Insect Interactions
Chemical Ecology
Ecology
Plant defense
Food web model
Metrics
H-Index
i10 Index
Citation
23
29
3,106
* Rankings
Ranking Based On Selection :73
Kazumichi Fujii
Soil acidification
Dissolved organic matter
Tropical forest
Metrics
H-Index
i10 Index
Citation
22
37
1,741
* Rankings
Ranking Based On Selection :89
Ryogo Nakada
heartwood formation
wetwood
wood anatomy
wood quality
Metrics
H-Index
i10 Index
Citation
21
35
1,394
* Rankings
Ranking Based On Selection :92
Aung Zaw Oo
Greenhouse gas
crop management
Environment
climate change
Plant nutrition
Metrics
H-Index
i10 Index
Citation
20
31
1,056
* Rankings
Ranking Based On Selection :93
Shingo Goto
ゲノム、遺伝子、DNAマーカー、耐病性
Metrics
H-Index
i10 Index
Citation
20
24
1,984
* Rankings
Ranking Based On Selection :95
Qing-Wei Wang
Forest ecology
solar radiation
UV-B stress
plant ecophysiology
Metrics
H-Index
i10 Index
Citation
20
28
1,233
* Rankings
Ranking Based On Selection :97
入路光雄
reproductive physiology on fish
endocrinology
reproductive biology of fish
aquaculture
Metrics
H-Index
i10 Index
Citation
20
27
938
* Rankings
Ranking Based On Selection :100
Tamotsu Sato
Forest Ecology
Carbon Dynamics in Forest Ecosystem
Silviculture
Metrics
H-Index
i10 Index
Citation
20
34
1,178
Rankings
Ranking Based On Selection: 1
Tohru Nakashizuka
Metrics
H-Index
i10 Index
Citation Counts
60
168
17,599
forest ecology
forest management
forest dynamics
climate change
biodiversity
Rankings
Ranking Based On Selection: 2
Akio Miyao
Metrics
H-Index
i10 Index
Citation Counts
59
97
17,900
Rankings
Ranking Based On Selection: 3
Toshihiro Hasegawa
Metrics
H-Index
i10 Index
Citation Counts
55
164
13,192
Climate Change
Rice
Free-air CO2 enrichment
crop model
Rankings
Ranking Based On Selection: 4
Takahiro Noda
Metrics
H-Index
i10 Index
Citation Counts
55
123
8,445
potato
sweetpotato
buckwheat
starch
carbohydrates
Rankings
Ranking Based On Selection: 5
Kyonoshin Maruyama
Metrics
H-Index
i10 Index
Citation Counts
53
62
26,768
Rankings
Ranking Based On Selection: 6
Norihiko Tomooka
Metrics
H-Index
i10 Index
Citation Counts
52
110
8,013
Rankings
Ranking Based On Selection: 7
Matthias Wissuwa
Metrics
H-Index
i10 Index
Citation Counts
51
94
10,210
Plant Breeding
Physiology
Genetics
Abiotic Stress Tolerance
Nutrient Efficiency
Rankings
Ranking Based On Selection: 8
Nakashima Kazuo
Metrics
H-Index
i10 Index
Citation Counts
49
81
20,771
Rankings
Ranking Based On Selection: 9
Subbarao Guntur
Metrics
H-Index
i10 Index
Citation Counts
48
82
9,288
Nitrification inhibition
Biological nitrification inhibition
nitrous oxide emissions
global warming
climate change
Rankings
Ranking Based On Selection: 10
Takao Komatsuda
Metrics
H-Index
i10 Index
Citation Counts
47
111
8,230
Rankings
Ranking Based On Selection: 11
Shigemi Seo
Metrics
H-Index
i10 Index
Citation Counts
44
68
7,679
植物生理学、植物病理学、環境保全、病害虫防除、天然物化学
Rankings
Ranking Based On Selection: 12
Ryozo Imai
Metrics
H-Index
i10 Index
Citation Counts
43
72
6,045
Rankings
Ranking Based On Selection: 14
Masaki Endo
Metrics
H-Index
i10 Index
Citation Counts
40
68
5,440
Rankings
Ranking Based On Selection: 15
Seinen Chow
Metrics
H-Index
i10 Index
Citation Counts
40
96
5,430
Rankings
Ranking Based On Selection: 17
Kazuhiko Nakahara
Metrics
H-Index
i10 Index
Citation Counts
38
55
7,494
Rankings
Ranking Based On Selection: 18
Mingyuan Du
Metrics
H-Index
i10 Index
Citation Counts
38
118
6,052
Alpine ecology
Dust emission
Flux
Tibetan Plateau
Wind erosion
Rankings
Ranking Based On Selection: 19
Takeshi Tokida
Metrics
H-Index
i10 Index
Citation Counts
37
65
3,779
Free-Air CO2 Enrichment (FACE)
Stable Isotope Biogeochemistry
Plant-soil-microbe interactions
Rice
Methane
Rankings
Ranking Based On Selection: 20
Chang-Jie Jiang
Metrics
H-Index
i10 Index
Citation Counts
36
56
5,340
Rankings
Ranking Based On Selection: 22
Kenji Saitoh
Metrics
H-Index
i10 Index
Citation Counts
36
68
5,862
ichthyology
fisheries
molecular phylogeny
aquatic biology
freshwater fish
Rankings
Ranking Based On Selection: 23
Hiroaki Ichikawa
Metrics
H-Index
i10 Index
Citation Counts
36
54
4,131
植物科学、植物分子生物学、分子遺伝学、バイオテクノロジー
Rankings
Ranking Based On Selection: 24
Takahide Kagawa
Metrics
H-Index
i10 Index
Citation Counts
35
47
11,314
Shinrin-yoku Forest Therapy Forest Medicine stress reduction Forest landscape planning Five sense stimulation Regional promotion Preventive Medicine Medical Tourism psychological benefits Coexisting with COVID-19
Rankings
Ranking Based On Selection: 25
Ronald C Estoque
Metrics
H-Index
i10 Index
Citation Counts
35
59
5,580
Forestry
Land Change Science
CC Mitigation/Adaptation
GIS/Remote Sensing
Sustainability Science
Rankings
Ranking Based On Selection: 26
Shigehiko Urawa
Metrics
H-Index
i10 Index
Citation Counts
35
107
4,010
salmon biology
fish parasite
disease
Rankings
Ranking Based On Selection: 27
Muroya Susumu
Metrics
H-Index
i10 Index
Citation Counts
34
67
3,330
Rankings
Ranking Based On Selection: 29
Tanaka Kenzo
Metrics
H-Index
i10 Index
Citation Counts
33
53
4,284
Rankings
Ranking Based On Selection: 30
Junichi Yonemaru
Metrics
H-Index
i10 Index
Citation Counts
32
50
3,413
Rankings
Ranking Based On Selection: 31
Toshiaki Takezawa
Metrics
H-Index
i10 Index
Citation Counts
32
67
3,454
tissue engineering
regenerative medicine
pharmacokinetics
toxicity
Rankings
Ranking Based On Selection: 32
Yusaku Uga
Metrics
H-Index
i10 Index
Citation Counts
31
47
4,818
root system architecture
drought resistance
rice
QTL cloning
root phenotyping
Rankings
Ranking Based On Selection: 33
Yuichi Yamaura
Metrics
H-Index
i10 Index
Citation Counts
31
81
4,387
landscape ecology
conservation biology
forest management
Rankings
Ranking Based On Selection: 34
Takahiro Kikawada
Metrics
H-Index
i10 Index
Citation Counts
31
54
3,737
Anhydrobiosis
Desiccation tolerance
Trehalose
LEA proteins
Transporters
Rankings
Ranking Based On Selection: 35
Nanko, Kazuki
Metrics
H-Index
i10 Index
Citation Counts
30
55
2,872
Raindrop
Ecohydrology
Soil erosion
ecomechanics
instrumentation
Rankings
Ranking Based On Selection: 36
Seiji Ohshimo
Metrics
H-Index
i10 Index
Citation Counts
30
75
2,653
Rankings
Ranking Based On Selection: 37
Kentaro Hayashi|林 健太郎
Metrics
H-Index
i10 Index
Citation Counts
30
65
2,974
Rankings
Ranking Based On Selection: 38
Yoshihiro Kawahara
Metrics
H-Index
i10 Index
Citation Counts
30
39
5,585
Rankings
Ranking Based On Selection: 39
Motoshige Yasuike
Metrics
H-Index
i10 Index
Citation Counts
29
61
2,598
Rankings
Ranking Based On Selection: 40
Shoji Sugano
Metrics
H-Index
i10 Index
Citation Counts
28
37
4,926
Rankings
Ranking Based On Selection: 41
Taiji Kawakatsu
Metrics
H-Index
i10 Index
Citation Counts
28
37
3,597
Plant biology
Epigenetics
Plant Biotechnology
Rankings
Ranking Based On Selection: 42
Shoichiro Yamamoto
Metrics
H-Index
i10 Index
Citation Counts
28
62
3,275
salmonids
population genetics
fisheries
conservation biology
conservation genetics
Rankings
Ranking Based On Selection: 43
Teruyoshi Nagamitsu
Metrics
H-Index
i10 Index
Citation Counts
28
52
3,325
Rankings
Ranking Based On Selection: 44
Haruhiko Inoue
Metrics
H-Index
i10 Index
Citation Counts
27
34
7,427
Rankings
Ranking Based On Selection: 46
Miyuki Iiyama
Metrics
H-Index
i10 Index
Citation Counts
27
48
2,260
Rankings
Ranking Based On Selection: 47
Shoji Hashimoto
Metrics
H-Index
i10 Index
Citation Counts
27
50
2,496
Rankings
Ranking Based On Selection: 48
Richard Cornette
Metrics
H-Index
i10 Index
Citation Counts
27
45
2,665
Insect physiology and adaptation to harsh environments
Rankings
Ranking Based On Selection: 49
Tomohiro Kakizaki
Metrics
H-Index
i10 Index
Citation Counts
27
34
2,618
Rankings
Ranking Based On Selection: 50
Toshihiro Sakamoto
Metrics
H-Index
i10 Index
Citation Counts
27
34
4,602
Rankings
Ranking Based On Selection: 51
Akifumi Ikehata 池羽田晶文
Metrics
H-Index
i10 Index
Citation Counts
27
48
2,042
Rankings
Ranking Based On Selection: 53
Kazutaka Yamamoto
Metrics
H-Index
i10 Index
Citation Counts
27
39
2,208
Rankings
Ranking Based On Selection: 54
Naoki Yamanaka
Metrics
H-Index
i10 Index
Citation Counts
26
43
3,230
Plant genetics
Plant breeding
Plant pathology
Rankings
Ranking Based On Selection: 55
Takuya Akiyama
Metrics
H-Index
i10 Index
Citation Counts
26
42
3,231
Rankings
Ranking Based On Selection: 56
Hiroshi Okamura
Metrics
H-Index
i10 Index
Citation Counts
26
59
2,117
Rankings
Ranking Based On Selection: 57
Hideki Takami
Metrics
H-Index
i10 Index
Citation Counts
26
43
1,905
Fisheries
Marine biology
Larval ecology
Benthic invertebrates
Rankings
Ranking Based On Selection: 58
Hideaki Oike
Metrics
H-Index
i10 Index
Citation Counts
25
36
2,524
Chrononutrition
hearing loss
Ageing
Taste
Rankings
Ranking Based On Selection: 59
Kazunori Minamikawa
Metrics
H-Index
i10 Index
Citation Counts
24
36
1,914
Rankings
Ranking Based On Selection: 60
Toshiyuki Takai
Metrics
H-Index
i10 Index
Citation Counts
24
34
4,040
Rice yield potential
photosynthesis
shoot branching
Rankings
Ranking Based On Selection: 61
Taketoshi Kodama
Metrics
H-Index
i10 Index
Citation Counts
24
39
1,584
Chemical Oceanography
Biological Oceanography
Fisheries Oceanography
Marine Ecology
Rankings
Ranking Based On Selection: 62
Ken Naito
Metrics
H-Index
i10 Index
Citation Counts
24
34
3,664
genetics
genomics
genus Vigna
food security
stress tolerance
Rankings
Ranking Based On Selection: 63
Keisuke Ono
Metrics
H-Index
i10 Index
Citation Counts
24
44
2,838
Rankings
Ranking Based On Selection: 64
Takehiko Yamanaka
Metrics
H-Index
i10 Index
Citation Counts
24
41
4,513
Rankings
Ranking Based On Selection: 65
Kyotaro Noguchi
Metrics
H-Index
i10 Index
Citation Counts
24
38
2,917
Rankings
Ranking Based On Selection: 66
Qingmin Han
Metrics
H-Index
i10 Index
Citation Counts
24
35
2,178
Tree Physiology
Forest Ecology
Mast seeding
Stress Physiology
Resource dynamics
Rankings
Ranking Based On Selection: 67
Ryo Ohtomo
Metrics
H-Index
i10 Index
Citation Counts
24
32
2,814
Rankings
Ranking Based On Selection: 68
Tokuko Ujino-Ihara
Metrics
H-Index
i10 Index
Citation Counts
24
34
1,986
forest genetics
genomics
local adaptation
Rankings
Ranking Based On Selection: 69
Takao Ito
Metrics
H-Index
i10 Index
Citation Counts
24
50
3,827
Rankings
Ranking Based On Selection: 70
Yasuhiro Usui
Metrics
H-Index
i10 Index
Citation Counts
23
33
3,164
Rice
Climate change
Free-Air CO2 Enrichment (FACE)
Paddy Field
Division of Farming System Research
Rankings
Ranking Based On Selection: 71
Kazuharu Nomura
Metrics
H-Index
i10 Index
Citation Counts
23
41
2,219
Japanese eel
selective breeding
genomic selection
Rankings
Ranking Based On Selection: 72
Kotaro Konno
Metrics
H-Index
i10 Index
Citation Counts
23
29
3,106
Plant-Insect Interactions
Chemical Ecology
Ecology
Plant defense
Food web model
Rankings
Ranking Based On Selection: 73
Kazumichi Fujii
Metrics
H-Index
i10 Index
Citation Counts
22
37
1,741
Soil acidification
Dissolved organic matter
Tropical forest
Rankings
Ranking Based On Selection: 74
Noriyuki Nishimura
Metrics
H-Index
i10 Index
Citation Counts
22
23
9,808
Rankings
Ranking Based On Selection: 75
Yoshiyuki Inagaki
Metrics
H-Index
i10 Index
Citation Counts
22
44
1,714
Rankings
Ranking Based On Selection: 76
Applied and Environmental Microbiology
Rankings
Ranking Based On Selection: 77
Kouki Fujioka
Metrics
H-Index
i10 Index
Citation Counts
22
41
4,169
Rankings
Ranking Based On Selection: 78
Takashi Nagai
Metrics
H-Index
i10 Index
Citation Counts
22
35
1,422
Rankings
Ranking Based On Selection: 79
Masaaki Taniguchi
Metrics
H-Index
i10 Index
Citation Counts
22
33
3,753
molecular genetics
livestock production
meat quality
Rankings
Ranking Based On Selection: 80
Akira Otuka
Metrics
H-Index
i10 Index
Citation Counts
22
36
1,867
Rankings
Ranking Based On Selection: 83
Ayako Nishizawa-Yokoi
Metrics
H-Index
i10 Index
Citation Counts
21
29
3,944
DNA repair
Genome editing
T-DNA integration
plant
Rankings
Ranking Based On Selection: 84
Satoru Miura
Metrics
H-Index
i10 Index
Citation Counts
21
36
1,673
Forest
Soil
Conservation
Radioecology
Carbon
Rankings
Ranking Based On Selection: 85
Yukiyoshi Iwata
Metrics
H-Index
i10 Index
Citation Counts
21
31
1,504
Rankings
Ranking Based On Selection: 86
Hajime Utsugi
Metrics
H-Index
i10 Index
Citation Counts
21
41
1,659
Rankings
Ranking Based On Selection: 88
Koji Tamai
Metrics
H-Index
i10 Index
Citation Counts
21
38
1,374
Rankings
Ranking Based On Selection: 89
Ryogo Nakada
Metrics
H-Index
i10 Index
Citation Counts
21
35
1,394
heartwood formation
wetwood
wood anatomy
wood quality
Rankings
Ranking Based On Selection: 90
Takeshi Toma
Metrics
H-Index
i10 Index
Citation Counts
21
31
1,663
Rankings
Ranking Based On Selection: 91
Taiki Mori
Metrics
H-Index
i10 Index
Citation Counts
20
41
1,980
Rankings
Ranking Based On Selection: 92
Aung Zaw Oo
Metrics
H-Index
i10 Index
Citation Counts
20
31
1,056
Greenhouse gas
crop management
Environment
climate change
Plant nutrition
Rankings
Ranking Based On Selection: 93
Shingo Goto
Metrics
H-Index
i10 Index
Citation Counts
20
24
1,984
ゲノム、遺伝子、DNAマーカー、耐病性
Rankings
Ranking Based On Selection: 94
Keizo Hirai
Metrics
H-Index
i10 Index
Citation Counts
20
40
1,663
Rankings
Ranking Based On Selection: 95
Qing-Wei Wang
Metrics
H-Index
i10 Index
Citation Counts
20
28
1,233
Forest ecology
solar radiation
UV-B stress
plant ecophysiology
Rankings
Ranking Based On Selection: 96
Takashi Inaoka
Metrics
H-Index
i10 Index
Citation Counts
20
34
1,712
Rankings
Ranking Based On Selection: 97
入路光雄
Metrics
H-Index
i10 Index
Citation Counts
20
27
938
reproductive physiology on fish
endocrinology
reproductive biology of fish
aquaculture
Rankings
Ranking Based On Selection: 99
Tamaki Shimose
Metrics
H-Index
i10 Index
Citation Counts
20
28
1,030
Ichthyology
Fish Biology
Fisheries Biology
Rankings
Ranking Based On Selection: 100
Tamotsu Sato
Metrics
H-Index
i10 Index
Citation Counts
20
34
1,178
Forest Ecology
Carbon Dynamics in Forest Ecosystem
Silviculture