World Scientist and University Rankings 2025
Japan Engineering & Technology / Chemical Engineering 134 Scientists Subject Rankings - 2025
The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 197 sub-branches at global, national, and regional levels. These analyses are based on indicators such as the H-index, i10-index, and citation count, including their values from the last 6 years. As of Jan 30, 2025, the rankings are determined according to the Total H Index. BETA VERSION: The subject field rankings for the world, regions, countries, and universities are currently in their Beta phase. This is due to the exclusion of (873.690) scientists categorized under ‘Others’, whose profiles have yet to be determined, edited, or classified. As updates are made to these fields, the rankings will be adjusted accordingly. Note: Please keep this in mind while reviewing the rankings. For further details, explore our [University Subject Rankings].
* Total H IndexRankings
Ranking Based On Selection: 1
Bioinformatics
Metrics
H-Index
i10 Index
Citation Counts
100
240
140,843
* Total H IndexRankings
Ranking Based On Selection: 2
Aerosol Science
Materials Science
Chemical Engineering
nucleation
Metrics
H-Index
i10 Index
Citation Counts
85
460
30,157
* Total H IndexRankings
Ranking Based On Selection: 3
Biomass
Hydrogen
Energy
Chemical Engineering
Electrochemistry
Metrics
H-Index
i10 Index
Citation Counts
80
381
24,100
* Total H IndexRankings
Ranking Based On Selection: 4
Plant hormones
Metrics
H-Index
i10 Index
Citation Counts
79
141
28,581
* Total H IndexRankings
Ranking Based On Selection: 5
Bioinformatics
Evolution
Ecology
Metrics
H-Index
i10 Index
Citation Counts
72
161
34,384
* Total H IndexRankings
Ranking Based On Selection: 6
Solid state chemistry
Materials Science
Metrics
H-Index
i10 Index
Citation Counts
69
279
19,195
* Total H IndexRankings
Ranking Based On Selection: 7
electrochemistry
bioelectrochemistry
energy chemistry
analytical electrochemistry
Metrics
H-Index
i10 Index
Citation Counts
68
342
15,751
* Total H IndexRankings
Ranking Based On Selection: 8
Electrochemistry
Batteries
Lithium-ion Batteries
Fuel Cells
Electrocatalysts
Metrics
H-Index
i10 Index
Citation Counts
63
189
18,880
* Total H IndexRankings
Ranking Based On Selection: 9
Chemical Engineering
gasification
pyrolysis
Metrics
H-Index
i10 Index
Citation Counts
62
213
13,530
* Total H IndexRankings
Ranking Based On Selection: 10
zeolites
Metrics
H-Index
i10 Index
Citation Counts
60
211
14,852
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* Total H IndexRankings
Ranking Based On Selection: 11
Metrics
H-Index
i10 Index
Citation Counts
53
101
10,890
* Total H IndexRankings
Ranking Based On Selection: 12
Quantum Chemistry
Electronic Structure Theory
Metrics
H-Index
i10 Index
Citation Counts
52
245
10,770
* Total H IndexRankings
Ranking Based On Selection: 13
Catalytic Materials Chemistry
Metrics
H-Index
i10 Index
Citation Counts
52
182
10,674
* Total H IndexRankings
Ranking Based On Selection: 14
Particle Technology
Aerosol
Transport Phenomena
Biosystems
Food
Metrics
H-Index
i10 Index
Citation Counts
48
106
8,313
* Total H IndexRankings
Ranking Based On Selection: 15
Heterogeneous catalysis
Energy conversion
Biomass
Solid acid and base
Layered materials
Metrics
H-Index
i10 Index
Citation Counts
46
116
10,792
* Total H IndexRankings
Ranking Based On Selection: 16
Biomass
Coal
Chemical Reaction Enginnering
CVD/CVI
Computational Fluid Dynamics
Metrics
H-Index
i10 Index
Citation Counts
42
117
5,782
* Total H IndexRankings
Ranking Based On Selection: 17
Chemical Engineering
Electrochemistry
porous carbon
capacitor
micro reactor
Metrics
H-Index
i10 Index
Citation Counts
42
78
5,581
* Total H IndexRankings
Ranking Based On Selection: 18
Chemical Engineering
Separation
Membrane
Metal Recovery
Colloid
Metrics
H-Index
i10 Index
Citation Counts
41
133
7,026
* Total H IndexRankings
Ranking Based On Selection: 19
Supercritical Fluids
Microwave
Biofuels
Biomass
Carbocatalysis
Metrics
H-Index
i10 Index
Citation Counts
38
95
4,679
* Total H IndexRankings
Ranking Based On Selection: 20
Polymer Chemistry
Protein Science
Organic Chemistry
Metrics
H-Index
i10 Index
Citation Counts
37
92
6,137
* Total H IndexRankings
Ranking Based On Selection: 21
Metrics
H-Index
i10 Index
Citation Counts
36
65
7,403
* Total H IndexRankings
Ranking Based On Selection: 22
Membrane separations
Metrics
H-Index
i10 Index
Citation Counts
34
58
3,905
* Total H IndexRankings
Ranking Based On Selection: 23
Chemical Engineering
Nanostructure Material Processing
Energy Storage Materials and Devices
Metrics
H-Index
i10 Index
Citation Counts
34
70
3,972
* Total H IndexRankings
Ranking Based On Selection: 24
Industrial Chemistry
Materials Chemistry
Coordination Chemistry
Metrics
H-Index
i10 Index
Citation Counts
34
72
3,380
* Total H IndexRankings
Ranking Based On Selection: 25
Automated organic synthesis
Theoretical chemistry
Metrics
H-Index
i10 Index
Citation Counts
33
63
3,481
Minoru Kanehisa
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
100
240
140,843
Kikuo Okuyama
Hiroshima University
Higashihiroshima, Japan
Metrics
H-Index
i10-Index
Citation Counts
85
460
30,157
Aerosol Science
Materials Science
Chemical Engineering
nucleation
Guoqing Guan
Hirosaki University
Hirosaki, Japan
Metrics
H-Index
i10-Index
Citation Counts
80
381
24,100
Biomass
Hydrogen
Energy
Chemical Engineering
Electrochemistry
Shinjiro Yamaguchi
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
79
141
28,581
Hiroyuki Ogata
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
72
161
34,384
Bioinformatics
Evolution
Ecology
Yuichi Shimakawa
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
69
279
19,195
Solid state chemistry
Materials Science
Takeo Ohsaka
Metrics
H-Index
i10-Index
Citation Counts
68
342
15,751
electrochemistry
bioelectrochemistry
energy chemistry
analytical electrochemistry
Minoru Inaba
Doshisha University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
63
189
18,880
Electrochemistry
Batteries
Lithium-ion Batteries
Fuel Cells
Electrocatalysts
Jun Ichiro Hayashi
Kyushu University
Fukuoka, Japan
Metrics
H-Index
i10-Index
Citation Counts
62
213
13,530
Chemical Engineering
gasification
pyrolysis
Toshiyuki Yokoi
Metrics
H-Index
i10-Index
Citation Counts
60
211
14,852
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Christine Padoch
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
53
101
10,890
Quantum Chemistry
Electronic Structure Theory
Masato Machida
Kumamoto University
Kumamoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
52
182
10,674
Catalytic Materials Chemistry
Wuled Lenggoro|I. W. Lenggoro, I. Wuled Lenggoro
Metrics
H-Index
i10-Index
Citation Counts
48
106
8,313
Particle Technology
Aerosol
Transport Phenomena
Biosystems
Food
Atsushi Takagaki
Kyushu University
Fukuoka, Japan
Metrics
H-Index
i10-Index
Citation Counts
46
116
10,792
Heterogeneous catalysis
Energy conversion
Biomass
Solid acid and base
Layered materials
Koyo Norinaga
Nagoya University
Nagoya, Japan
Metrics
H-Index
i10-Index
Citation Counts
42
117
5,782
Biomass
Coal
Chemical Reaction Enginnering
CVD/CVI
Computational Fluid Dynamics
Muto Akinori
Metrics
H-Index
i10-Index
Citation Counts
42
78
5,581
Chemical Engineering
Electrochemistry
porous carbon
capacitor
micro reactor
Hidetaka Kawakita
Saga University
Saga, Japan
Metrics
H-Index
i10-Index
Citation Counts
41
133
7,026
Chemical Engineering
Separation
Membrane
Metal Recovery
Colloid
Armando T Quitain
Kumamoto University
Kumamoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
38
95
4,679
Supercritical Fluids
Microwave
Biofuels
Biomass
Carbocatalysis
Polymer Chemistry
Protein Science
Organic Chemistry
Izumi Taniguchi
Metrics
H-Index
i10-Index
Citation Counts
34
70
3,972
Chemical Engineering
Nanostructure Material Processing
Energy Storage Materials and Devices
Nomura Ryoki
Metrics
H-Index
i10-Index
Citation Counts
34
72
3,380
Industrial Chemistry
Materials Chemistry
Coordination Chemistry
Yuuya Nagata
Hokkaido University
Sapporo, Japan
Metrics
H-Index
i10-Index
Citation Counts
33
63
3,481
Automated organic synthesis
Theoretical chemistry