University, Subject, Country, Region, World
Japan 153 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 Feb 03, 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 (870.057) 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: 26
Aerospace Engineering
Fluid Dynamics
Aeroacoustics
Flow Control
Reduced Order Modeling
Metrics
H-Index
i10 Index
Citation Counts
42
174
6,746
* Total H IndexRankings
Ranking Based On Selection: 27
astronomy
astrophysics
planet formation
star formation
Metrics
H-Index
i10 Index
Citation Counts
42
83
5,995
* Total H IndexRankings
Ranking Based On Selection: 28
Astronomy
Astrophysics
Astronomical Instrumentation
Adaptive Optics
Polarimetry
Metrics
H-Index
i10 Index
Citation Counts
42
103
6,085
* Total H IndexRankings
Ranking Based On Selection: 29
Astrophysics
Astronomy
Metrics
H-Index
i10 Index
Citation Counts
41
75
7,118
* Total H IndexRankings
Ranking Based On Selection: 30
Astrophysics
Metrics
H-Index
i10 Index
Citation Counts
39
95
6,960
* Total H IndexRankings
Ranking Based On Selection: 31
Astrophysics
Radiation detection
Metrics
H-Index
i10 Index
Citation Counts
38
88
6,219
* Total H IndexRankings
Ranking Based On Selection: 32
Planet formation
Metrics
H-Index
i10 Index
Citation Counts
37
64
3,835
* Total H IndexRankings
Ranking Based On Selection: 33
Astronomy & Astrophysics
Planetary Science
Materials Science
Plasma Physics
Metrics
H-Index
i10 Index
Citation Counts
35
72
4,638
* Total H IndexRankings
Ranking Based On Selection: 34
Turbulence
Compressible Flows
Computational Physics
Data Science
Metrics
H-Index
i10 Index
Citation Counts
34
62
4,856
* Total H IndexRankings
Ranking Based On Selection: 35
Aerospace Engineering
Design Engineering
Computational Fluid Dynamics
Evolutionary Computation
Metrics
H-Index
i10 Index
Citation Counts
34
103
4,238
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!
* Total H IndexRankings
Ranking Based On Selection: 36
Astrophysics
Metrics
H-Index
i10 Index
Citation Counts
34
49
5,208
* Total H IndexRankings
Ranking Based On Selection: 37
Galaxy Formation
Metrics
H-Index
i10 Index
Citation Counts
34
57
3,486
* Total H IndexRankings
Ranking Based On Selection: 38
Meteors
Meteoroids
Asteroids
Comets
Lunar Impact Flash
Metrics
H-Index
i10 Index
Citation Counts
33
103
5,786
* Total H IndexRankings
Ranking Based On Selection: 39
Computational Fluid Dynamics
Mesh Generation
Metrics
H-Index
i10 Index
Citation Counts
33
81
4,396
* Total H IndexRankings
Ranking Based On Selection: 40
Remote Sensing
Precipitation
Cloud
Radar
Microwave radiometer
Metrics
H-Index
i10 Index
Citation Counts
32
65
6,144
* Total H IndexRankings
Ranking Based On Selection: 41
Astronomy
Astrophysics
Metrics
H-Index
i10 Index
Citation Counts
32
83
3,938
* Total H IndexRankings
Ranking Based On Selection: 42
Astronomy
Astrophysics
Science Education
Metrics
H-Index
i10 Index
Citation Counts
32
62
3,011
* Total H IndexRankings
Ranking Based On Selection: 43
Astroparticle physics
Metrics
H-Index
i10 Index
Citation Counts
31
50
3,709
* Total H IndexRankings
Ranking Based On Selection: 44
Composite materials
Micromechanics
Carbon nanomaterials
High-throughput screening calculation
Metrics
H-Index
i10 Index
Citation Counts
31
58
3,682
* Total H IndexRankings
Ranking Based On Selection: 45
Thermal Engineering
Aerospace Engineering
Metrics
H-Index
i10 Index
Citation Counts
30
82
3,103
* Total H IndexRankings
Ranking Based On Selection: 46
Planet evolution
Metrics
H-Index
i10 Index
Citation Counts
30
38
5,536
* Total H IndexRankings
Ranking Based On Selection: 47
astronomy
astrophysics
cosmology
Metrics
H-Index
i10 Index
Citation Counts
30
51
2,312
* Total H IndexRankings
Ranking Based On Selection: 48
Astrophysics
Cosmology
High Performance Computing
Metrics
H-Index
i10 Index
Citation Counts
30
49
2,403
* Total H IndexRankings
Ranking Based On Selection: 49
Integrated design and analyses for sustainable energy systems
Metrics
H-Index
i10 Index
Citation Counts
29
47
3,994
* Total H IndexRankings
Ranking Based On Selection: 50
elementary particle physics
astroparticle physics
cosmic-ray physics
Metrics
H-Index
i10 Index
Citation Counts
29
47
8,310
Taku Nonomura|野々村拓
Tohoku University
Sendai, Japan
Metrics
H-Index
i10-Index
Citation Counts
42
174
6,746
Aerospace Engineering
Fluid Dynamics
Aeroacoustics
Flow Control
Reduced Order Modeling
Munetake Momose
Ibaraki University
Mito, Japan
Metrics
H-Index
i10-Index
Citation Counts
42
83
5,995
astronomy
astrophysics
planet formation
star formation
Makoto Watanabe|M. Watanabe, 渡邉 誠, 渡邊 誠
Okayama University of Science
Okayama, Japan
Metrics
H-Index
i10-Index
Citation Counts
42
103
6,085
Astronomy
Astrophysics
Astronomical Instrumentation
Adaptive Optics
Polarimetry
Takashi Hosokawa
Kyoto University
Kyoto, Japan
Metrics
H-Index
i10-Index
Citation Counts
41
75
7,118
Astrophysics
Astronomy
Satoru Katsuda
Saitama University
Saitama, Japan
Metrics
H-Index
i10-Index
Citation Counts
39
95
6,960
Shin Ichiro Takeda
Metrics
H-Index
i10-Index
Citation Counts
38
88
6,219
Astrophysics
Radiation detection
Akimasa Kataoka
Metrics
H-Index
i10-Index
Citation Counts
37
64
3,835
Astronomy & Astrophysics
Planetary Science
Materials Science
Plasma Physics
Turbulence
Compressible Flows
Computational Physics
Data Science
Akira Oyama
Metrics
H-Index
i10-Index
Citation Counts
34
103
4,238
Aerospace Engineering
Design Engineering
Computational Fluid Dynamics
Evolutionary Computation
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!
Takashi Okamoto
Hokkaido University
Sapporo, Japan
Metrics
H-Index
i10-Index
Citation Counts
34
49
5,208
Masahiro Nagashima
Bunkyo University
Koshigaya, Japan
Metrics
H-Index
i10-Index
Citation Counts
34
57
3,486
Meteors
Meteoroids
Asteroids
Comets
Lunar Impact Flash
Yasushi Ito
Metrics
H-Index
i10-Index
Citation Counts
33
81
4,396
Computational Fluid Dynamics
Mesh Generation
Takuji Kubota
Metrics
H-Index
i10-Index
Citation Counts
32
65
6,144
Remote Sensing
Precipitation
Cloud
Radar
Microwave radiometer
Kohei Ichikawa
Tohoku University
Sendai, Japan
Metrics
H-Index
i10-Index
Citation Counts
32
83
3,938
Astronomy
Astrophysics
Tomoka Tosaki
Joetsu University of Education
Joetsu, Japan
Metrics
H-Index
i10-Index
Citation Counts
32
62
3,011
Astronomy
Astrophysics
Science Education
Nakamura Shogo
Yokohama National University
Yokohama, Japan
Metrics
H-Index
i10-Index
Citation Counts
31
50
3,709
Astroparticle physics
Composite materials
Micromechanics
Carbon nanomaterials
High-throughput screening calculation
Thermal Engineering
Aerospace Engineering
John Hernlund
Earth-Life Science Institute
Saitama, Japan
Metrics
H-Index
i10-Index
Citation Counts
30
38
5,536
Hidenobu Yajima
University of Tsukuba
Tsukuba, Japan
Metrics
H-Index
i10-Index
Citation Counts
30
51
2,312
astronomy
astrophysics
cosmology
Kohji Yoshikawa
University of Tsukuba
Tsukuba, Japan
Metrics
H-Index
i10-Index
Citation Counts
30
49
2,403
Astrophysics
Cosmology
High Performance Computing
Toshihiko Nakata
Tohoku University
Sendai, Japan
Metrics
H-Index
i10-Index
Citation Counts
29
47
3,994
Integrated design and analyses for sustainable energy systems
Yoichi Asaoka 浅岡陽一
Waseda University
Tokyo, Japan
Metrics
H-Index
i10-Index
Citation Counts
29
47
8,310
elementary particle physics
astroparticle physics
cosmic-ray physics