Rankings for Scientist

University, Subject, Country, Region, World

University of Ryukyus 61 Scientists Subject Rankings - 2025

The AD Scientific Index (Alper-Doger Scientific Index) provides the most comprehensive analysis across 13 main fields and 211 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 Jun 15, 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 (1.121.296) 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].

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Total 61 scientists, 221 country, 24.551 institution
* Total H Index Rankings

Rankings

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117,907
World Rank
Japan
2,337
Country Rank
University of Ryukyus Logo
7
University
Ranking Based On Selection:
1
Shinkichi Tawata 多和田真吉
University of Ryukyus Sendai, Japan
Others
PAK1 | Alpinia zerumbet | Leucaena leucocephal

H-Index Metrics

  • H-Index
    44
  • i10 Index
    98
  • Citation Counts
    8,136
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* Total H Index Rankings

Rankings

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149,193
World Rank
Japan
3,032
Country Rank
University of Ryukyus Logo
9
University
Ranking Based On Selection:
2
Gaku Tokuda
University of Ryukyus Sendai, Japan
Others
Termite | Digestive System | Cellulase | Symbiosi

H-Index Metrics

  • H-Index
    40
  • i10 Index
    56
  • Citation Counts
    6,219
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* Total H Index Rankings

Rankings

flag
168,047
World Rank
Japan
3,486
Country Rank
University of Ryukyus Logo
13
University
Ranking Based On Selection:
3
Ichiro Komiya
University of Ryukyus Sendai, Japan
Others
Diabetes | Hypertension | Lipidolog

H-Index Metrics

  • H-Index
    38
  • i10 Index
    78
  • Citation Counts
    4,917
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* Total H Index Rankings

Rankings

flag
207,252
World Rank
Japan
4,321
Country Rank
University of Ryukyus Logo
18
University
Ranking Based On Selection:
4
Shiki Okamoto
University of Ryukyus Sendai, Japan
Others
神経科学、神経内分�

H-Index Metrics

  • H-Index
    34
  • i10 Index
    51
  • Citation Counts
    4,551
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* Total H Index Rankings

Rankings

flag
222,563
World Rank
Japan
4,731
Country Rank
University of Ryukyus Logo
19
University
Ranking Based On Selection:
5
Hironori Iwasaki
University of Ryukyus Sendai, Japan
Others

H-Index Metrics

  • H-Index
    33
  • i10 Index
    58
  • Citation Counts
    2,752
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* Total H Index Rankings

Rankings

flag
263,006
World Rank
Japan
5,579
Country Rank
University of Ryukyus Logo
20
University
Ranking Based On Selection:
6
瓜生康史
University of Ryukyus Sendai, Japan
Others

H-Index Metrics

  • H-Index
    30
  • i10 Index
    57
  • Citation Counts
    3,817
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* Total H Index Rankings

Rankings

flag
281,106
World Rank
Japan
5,994
Country Rank
University of Ryukyus Logo
21
University
Ranking Based On Selection:
7
Claudia Toma
University of Ryukyus Sendai, Japan
Others

H-Index Metrics

  • H-Index
    29
  • i10 Index
    47
  • Citation Counts
    3,719
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* Total H Index Rankings

Rankings

flag
301,309
World Rank
Japan
6,462
Country Rank
University of Ryukyus Logo
22
University
Ranking Based On Selection:
8
Hajime Tamaki
University of Ryukyus Sendai, Japan
Others
天然物化学、食品機能科学、生物化�

H-Index Metrics

  • H-Index
    28
  • i10 Index
    61
  • Citation Counts
    2,727
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* Total H Index Rankings

Rankings

flag
341,652
World Rank
Japan
7,367
Country Rank
University of Ryukyus Logo
25
University
Ranking Based On Selection:
9
R Shiina
University of Ryukyus Sendai, Japan
Others
物性理�

H-Index Metrics

  • H-Index
    26
  • i10 Index
    39
  • Citation Counts
    2,792
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* Total H Index Rankings

Rankings

flag
377,028
World Rank
Japan
8,053
Country Rank
University of Ryukyus Logo
27
University
Ranking Based On Selection:
10
Kazuhiko Fujita
University of Ryukyus Sendai, Japan
Others
Foraminifera | Coral Reefs | Global Chang

H-Index Metrics

  • H-Index
    24
  • i10 Index
    37
  • Citation Counts
    2,267
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* Total H Index Rankings

Rankings

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464,863
World Rank
Japan
9,858
Country Rank
University of Ryukyus Logo
34
University
Ranking Based On Selection:
11
Tohru Naruse
University of Ryukyus Sendai, Japan
Others

H-Index Metrics

  • H-Index
    21
  • i10 Index
    74
  • Citation Counts
    2,354
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* Total H Index Rankings

Rankings

flag
472,051
World Rank
Japan
10,074
Country Rank
University of Ryukyus Logo
35
University
Ranking Based On Selection:
12
Hasan Masrur
University of Ryukyus Sendai, Japan
Others
Energy Systems | Resilience | Optimization | Electric Vehicles | Data Analytic

H-Index Metrics

  • H-Index
    20
  • i10 Index
    33
  • Citation Counts
    1,217
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* Total H Index Rankings

Rankings

flag
535,604
World Rank
Japan
11,225
Country Rank
University of Ryukyus Logo
41
University
Ranking Based On Selection:
13
Shinjiro Tachibana
University of Ryukyus Sendai, Japan
Others

H-Index Metrics

  • H-Index
    19
  • i10 Index
    27
  • Citation Counts
    920
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* Total H Index Rankings

Rankings

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912,139
World Rank
Japan
17,476
Country Rank
University of Ryukyus Logo
62
University
Ranking Based On Selection:
14
Kobayashi Shun
University of Ryukyus Sendai, Japan
Others
pollination | non-flying mammal | Ryukyu | Mucuna | Megacrani

H-Index Metrics

  • H-Index
    11
  • i10 Index
    13
  • Citation Counts
    324
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* Total H Index Rankings

Rankings

flag
938,413
World Rank
Japan
17,837
Country Rank
University of Ryukyus Logo
63
University
Ranking Based On Selection:
15
Keiichi Funaki
University of Ryukyus Sendai, Japan
Others
speech signal processing | speech enhancement | speech analysi

H-Index Metrics

  • H-Index
    11
  • i10 Index
    14
  • Citation Counts
    404
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* Total H Index Rankings

Rankings

flag
970,252
World Rank
Japan
18,360
Country Rank
University of Ryukyus Logo
65
University
Ranking Based On Selection:
16
Ahmad Shah Irshad
University of Ryukyus Sendai, Japan
Others
Renewable Energy | Power System | Microgrid | Smart Grid | Energy Storag

H-Index Metrics

  • H-Index
    10
  • i10 Index
    10
  • Citation Counts
    236
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* Total H Index Rankings

Rankings

flag
1,061,097
World Rank
Japan
19,681
Country Rank
University of Ryukyus Logo
68
University
Ranking Based On Selection:
17
Rocktim Ramen Das|Rocktim Das, Rocktim RD, Rocktim R Das
University of Ryukyus Sendai, Japan
Others
Coral Reefs | Marine Biolog

H-Index Metrics

  • H-Index
    9
  • i10 Index
    8
  • Citation Counts
    182
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* Total H Index Rankings

Rankings

flag
1,106,071
World Rank
Japan
20,300
Country Rank
University of Ryukyus Logo
70
University
Ranking Based On Selection:
18
T Yoshida
University of Ryukyus Sendai, Japan
Others

H-Index Metrics

  • H-Index
    9
  • i10 Index
    9
  • Citation Counts
    426
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* Total H Index Rankings

Rankings

flag
1,125,382
World Rank
Japan
20,620
Country Rank
University of Ryukyus Logo
72
University
Ranking Based On Selection:
19
Shinji Kono
University of Ryukyus Sendai, Japan
Others
Programming Language | Verification | Operating System | Continuatio

H-Index Metrics

  • H-Index
    9
  • i10 Index
    7
  • Citation Counts
    287
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* Total H Index Rankings

Rankings

flag
1,192,324
World Rank
Japan
21,560
Country Rank
University of Ryukyus Logo
78
University
Ranking Based On Selection:
20
Yasuyuki Kanda|神田　康行
University of Ryukyus Sendai, Japan
Others
材料加工学，計算力�

H-Index Metrics

  • H-Index
    8
  • i10 Index
    7
  • Citation Counts
    182
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* Total H Index Rankings

Rankings

flag
1,251,310
World Rank
Japan
22,360
Country Rank
University of Ryukyus Logo
81
University
Ranking Based On Selection:
21
Tanveer Ali
University of Ryukyus Sendai, Japan
Others
Molecular Microbiology and Immunolog

H-Index Metrics

  • H-Index
    7
  • i10 Index
    7
  • Citation Counts
    270
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* Total H Index Rankings

Rankings

flag
1,372,444
World Rank
Japan
23,879
Country Rank
University of Ryukyus Logo
82
University
Ranking Based On Selection:
22
Naoki Oshiro
University of Ryukyus Sendai, Japan
Others
computer vision | image processing | robotic

H-Index Metrics

  • H-Index
    7
  • i10 Index
    3
  • Citation Counts
    152
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* Total H Index Rankings

Rankings

flag
1,392,421
World Rank
Japan
24,164
Country Rank
University of Ryukyus Logo
83
University
Ranking Based On Selection:
23
Homeyra Akter
University of Ryukyus Sendai, Japan
Others
Optimization | Renewable and Sustainable Development | Techno-Economic Analysi

H-Index Metrics

  • H-Index
    6
  • i10 Index
    6
  • Citation Counts
    177
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* Total H Index Rankings

Rankings

flag
1,417,443
World Rank
Japan
24,492
Country Rank
University of Ryukyus Logo
85
University
Ranking Based On Selection:
24
Hirotatsu İmai
University of Ryukyus Sendai, Japan
Others
Ribosome | mRNA Translatio

H-Index Metrics

  • H-Index
    6
  • i10 Index
    5
  • Citation Counts
    132
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* Total H Index Rankings

Rankings

flag
1,536,969
World Rank
Japan
26,031
Country Rank
University of Ryukyus Logo
92
University
Ranking Based On Selection:
25
Adam Murray
University of Ryukyus Sendai, Japan
Others
Listening instruction | assessment | peer feedbac

H-Index Metrics

  • H-Index
    6
  • i10 Index
    2
  • Citation Counts
    110
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