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H-Index
Rankings

Japan 366 Scientists H-Index Engineering & Technology / Environmental Science & Engineering Rankings - 2026

Track the real-time academic impact of 2.6 million scientists across 221 countries. The H-Index Rankings evaluate both total and last 5 years’ H-index values, offering the most transparent measure of scholarly recognition. Compare global, continental, national, and institutional performance across 13 major fields and 221 disciplines.

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Total 366 scientist , 791 institution , Updates every 3 days
* Total H Index Rankings

Rankings

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14,273
World Rank
Japan
185
Country Rank
Tohoku University Logo
10
University
Ranking Based On Selection:
1
李玉友|李 玉友, Gyokuyu RI
Tohoku University Sendai, Japan
Engineering & Technology / Environmental Science & Engineering
Biological wastewater treatment | Biofilm | Anaerobic digestion | Anammox | MB

H-Index Metrics

  • Total
    92
  • Last 5 Years
    77
  • Last 5 Years / Total
    0.837
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* Total H Index Rankings

Rankings

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14,846
World Rank
Japan
200
Country Rank
Kyushu University Logo
7
University
Ranking Based On Selection:
2
Shunsuke Managi
Kyushu University Fukuoka, Japan
Engineering & Technology / Environmental Science & Engineering
Urban Analytics | Urban Policy | Sustainable Operations | Climate Change Economics | Wellbein

H-Index Metrics

  • Total
    91
  • Last 5 Years
    76
  • Last 5 Years / Total
    0.835
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* Total H Index Rankings

Rankings

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19,898
World Rank
Japan
292
Country Rank
University of Tokyo Logo
28
University
Ranking Based On Selection:
3
Ayako Abe Ouchi
University of Tokyo Tokyo, Japan
Engineering & Technology / Environmental Science & Engineering
Climate | climate modelling | ice sheet dynamics | paleoclimatology | pale oceanograph

H-Index Metrics

  • Total
    84
  • Last 5 Years
    59
  • Last 5 Years / Total
    0.702
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* Total H Index Rankings

Rankings

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21,924
World Rank
Japan
329
Country Rank
Japan Meteorological Agency Logo
1
University
Ranking Based On Selection:
4
Akio Kitoh
Japan Meteorological Agency Tokyo, Japan
Engineering & Technology / Environmental Science & Engineering
Climate Change | Monsoo

H-Index Metrics

  • Total
    82
  • Last 5 Years
    49
  • Last 5 Years / Total
    0.598
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* Total H Index Rankings

Rankings

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22,336
World Rank
Japan
339
Country Rank
Kyoto University Logo
30
University
Ranking Based On Selection:
5
Shinichiro Fujimori
Kyoto University Kyoto, Japan
Engineering & Technology / Environmental Science & Engineering
Climate change | Integrated Assessment Models | Energy modelin

H-Index Metrics

  • Total
    81
  • Last 5 Years
    72
  • Last 5 Years / Total
    0.889
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* Total H Index Rankings

Rankings

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46,805
World Rank
Japan
784
Country Rank
University of Tsukuba Logo
12
University
Ranking Based On Selection:
6
Zhongfang Lei
University of Tsukuba Tsukuba, Japan
Engineering & Technology / Environmental Science & Engineering
Waste and wastewater treatment | biogasification | nutrients removal and recovery | heavy metal

H-Index Metrics

  • Total
    64
  • Last 5 Years
    57
  • Last 5 Years / Total
    0.891
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* Total H Index Rankings

Rankings

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50,366
World Rank
Japan
854
Country Rank
Tohoku University Logo
48
University
Ranking Based On Selection:
7
Kiwamu Minamisawa
Tohoku University Sendai, Japan
Engineering & Technology / Environmental Science & Engineering
Plant-microbe interactions | rhizobial ecology | genome evolutio

H-Index Metrics

  • Total
    63
  • Last 5 Years
    37
  • Last 5 Years / Total
    0.587
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* Total H Index Rankings

Rankings

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53,299
World Rank
Japan
935
Country Rank
Hirosaki University Logo
2
University
Ranking Based On Selection:
8
Yukihiro Nojiri
Hirosaki University Hirosaki, Japan
Engineering & Technology / Environmental Science & Engineering
oceanography | biogeochemistry | geochemistry | carbon cycle | climate chang

H-Index Metrics

  • Total
    62
  • Last 5 Years
    30
  • Last 5 Years / Total
    0.484
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* Total H Index Rankings

Rankings

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58,037
World Rank
Japan
1,047
Country Rank
Mie University Logo
5
University
Ranking Based On Selection:
9
Satoshi Kaneco
Mie University Tsu, Japan
Engineering & Technology / Environmental Science & Engineering

H-Index Metrics

  • Total
    60
  • Last 5 Years
    35
  • Last 5 Years / Total
    0.583
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* Total H Index Rankings

Rankings

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60,833
World Rank
Japan
1,111
Country Rank
Yokohama National University Logo
8
University
Ranking Based On Selection:
10
Shigeki Masunaga
Yokohama National University Yokohama, Japan
Engineering & Technology / Environmental Science & Engineering
Environmental Scienc

H-Index Metrics

  • Total
    59
  • Last 5 Years
    34
  • Last 5 Years / Total
    0.576
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* Total H Index Rankings

Rankings

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62,830
World Rank
Japan
1,145
Country Rank
National Institute for Environmental Studies, Japan Logo
4
University
Ranking Based On Selection:
11
Shamil Maksyutov
National Institute for Environmental Studies, Japan Ibaraki, Japan
Engineering & Technology / Environmental Science & Engineering
climate change | biogeochemistry | inverse modeling | data assimilation | remote sensin

H-Index Metrics

  • Total
    58
  • Last 5 Years
    41
  • Last 5 Years / Total
    0.707
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* Total H Index Rankings

Rankings

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65,424
World Rank
Japan
1,199
Country Rank
National Institute for Environmental Studies, Japan Logo
5
University
Ranking Based On Selection:
12
Hideo Shiogama
National Institute for Environmental Studies, Japan Ibaraki, Japan
Engineering & Technology / Environmental Science & Engineering
Climate Scienc

H-Index Metrics

  • Total
    57
  • Last 5 Years
    45
  • Last 5 Years / Total
    0.789
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* Total H Index Rankings

Rankings

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65,437
World Rank
Japan
1,200
Country Rank
Hokkaido University Logo
39
University
Ranking Based On Selection:
13
Masaaki Kitajima
Hokkaido University Sapporo, Japan
Engineering & Technology / Environmental Science & Engineering
Environmental Virology | Wastewater-based Epidemiolog

H-Index Metrics

  • Total
    57
  • Last 5 Years
    45
  • Last 5 Years / Total
    0.789
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* Total H Index Rankings

Rankings

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70,495
World Rank
Japan
1,286
Country Rank
University of Tokyo Logo
78
University
Ranking Based On Selection:
14
Shinsuke Kato
University of Tokyo Tokyo, Japan
Engineering & Technology / Environmental Science & Engineering
Building Enviromental Engineerin

H-Index Metrics

  • Total
    56
  • Last 5 Years
    31
  • Last 5 Years / Total
    0.554
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* Total H Index Rankings

Rankings

flag
71,127
World Rank
Japan
1,312
Country Rank
Ehime University Logo
8
University
Ranking Based On Selection:
15
Hisato Iwata
Ehime University Matsuyama, Japan
Engineering & Technology / Environmental Science & Engineering
Environmental Toxicology | Chemical Pollution | Environmental Chemistry | Ecotoxicology | Aquatic Toxicolog

H-Index Metrics

  • Total
    56
  • Last 5 Years
    24
  • Last 5 Years / Total
    0.429
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* Total H Index Rankings

Rankings

flag
71,450
World Rank
Japan
1,323
Country Rank
Hokkaido University Logo
44
University
Ranking Based On Selection:
16
Ram Avtar
Hokkaido University Sapporo, Japan
Engineering & Technology / Environmental Science & Engineering
Environmental Science | Remote Sensing | GIS | REDD+ | Sustainability Scienc

H-Index Metrics

  • Total
    55
  • Last 5 Years
    51
  • Last 5 Years / Total
    0.927
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* Total H Index Rankings

Rankings

flag
74,821
World Rank
Japan
1,400
Country Rank
Nagoya University Logo
68
University
Ranking Based On Selection:
17
Takashi Hibino
Nagoya University Nagoya, Japan
Engineering & Technology / Environmental Science & Engineering
Fuel Cells | Electrolyzers | Sensors | Batterie

H-Index Metrics

  • Total
    55
  • Last 5 Years
    22
  • Last 5 Years / Total
    0.400
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* Total H Index Rankings

Rankings

flag
75,208
World Rank
Japan
1,406
Country Rank
Kobe University Logo
25
University
Ranking Based On Selection:
18
Toshifumi Minamoto
Kobe University Kobe, Japan
Engineering & Technology / Environmental Science & Engineering
eDNA Research | Freshwater Ecology | Ecology of Infectious Diseases | Animal Physiolog

H-Index Metrics

  • Total
    54
  • Last 5 Years
    49
  • Last 5 Years / Total
    0.907
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* Total H Index Rankings

Rankings

flag
76,742
World Rank
Japan
1,422
Country Rank
Institute for Global Environmental Strategies (IGES) Logo
1
University
Ranking Based On Selection:
19
Kazuhiko Takeuchi
Institute for Global Environmental Strategies (IGES) San Nicolás, Japan
Engineering & Technology / Environmental Science & Engineering
environmental studie

H-Index Metrics

  • Total
    54
  • Last 5 Years
    37
  • Last 5 Years / Total
    0.685
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* Total H Index Rankings

Rankings

flag
79,522
World Rank
Japan
1,491
Country Rank
Tohoku University Logo
82
University
Ranking Based On Selection:
20
Tomoki Nakaya
Tohoku University Sendai, Japan
Engineering & Technology / Environmental Science & Engineering
GIScience | spatial analysis | health geography | crime geography | spatial epidemiolog

H-Index Metrics

  • Total
    53
  • Last 5 Years
    43
  • Last 5 Years / Total
    0.811
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* Total H Index Rankings

Rankings

flag
84,060
World Rank
Japan
1,587
Country Rank
United Nations University Logo
4
University
Ranking Based On Selection:
21
Vladimir Smakhtin
United Nations University Tokyo, Japan
Engineering & Technology / Environmental Science & Engineering
Water | hydrology | floods | droughts | environmental flow

H-Index Metrics

  • Total
    52
  • Last 5 Years
    40
  • Last 5 Years / Total
    0.769
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* Total H Index Rankings

Rankings

flag
90,242
World Rank
Japan
1,737
Country Rank
Kyushu University Logo
58
University
Ranking Based On Selection:
22
Satoshi Utsunomiya
Kyushu University Fukuoka, Japan
Engineering & Technology / Environmental Science & Engineering
Environmental Sciences | Mineralogy | Geochemistr

H-Index Metrics

  • Total
    51
  • Last 5 Years
    31
  • Last 5 Years / Total
    0.608
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* Total H Index Rankings

Rankings

flag
90,960
World Rank
Japan
1,761
Country Rank
Shinshu University Logo
8
University
Ranking Based On Selection:
23
Takashi Kunito
Shinshu University Matsumoto, Japan
Engineering & Technology / Environmental Science & Engineering

H-Index Metrics

  • Total
    51
  • Last 5 Years
    27
  • Last 5 Years / Total
    0.529
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* Total H Index Rankings

Rankings

flag
93,710
World Rank
Japan
1,812
Country Rank
National Agriculture and Food Research Organization Logo
9
University
Ranking Based On Selection:
24
Subbarao Guntur
National Agriculture and Food Research Organization Tsukuba, Japan
Engineering & Technology / Environmental Science & Engineering
Nitrification inhibition | Biological nitrification inhibition | nitrous oxide emissions | global warming | climate chang

H-Index Metrics

  • Total
    50
  • Last 5 Years
    36
  • Last 5 Years / Total
    0.720
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* Total H Index Rankings

Rankings

flag
100,369
World Rank
Japan
1,980
Country Rank
Toyo University Logo
2
University
Ranking Based On Selection:
25
Yoshinori Kawase
Toyo University Tokyo, Japan
Engineering & Technology / Environmental Science & Engineering
wastewater treatment | stirred tank | photocatalyst | zero-valent iron | Fenton proces

H-Index Metrics

  • Total
    49
  • Last 5 Years
    27
  • Last 5 Years / Total
    0.551
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