AD Scientific Index
 Open Nav
Login Login Pricing & Plans Pricing & Plans
Engineering & Technology

Citation Rankings
Highly Cited Researchers

Engineering & Technology / Energy Engineering Highly Cited Researchers 111 Scientists Citation in Japan Rankings - 2026

See how widely and consistently research is cited with real-time citation rankings.
Covering 2.6 million scientists, this list evaluates both total and last 5 years’ citation counts to measure scientific influence and highlight Highly Cited Researchers.
Built on transparency, it also addresses unethical practices and encourages reporting of violations. Compare results across 13 fields and 221 disciplines.

search
×
Total 111 scientists , 791 institution , Updates every 3 days
* Total Citation Counts Rankings

Rankings

flag
19,029
World Rank
Japan
239
Country Rank
Yokohama National University Logo
2
University
Ranking Based On Selection:
1
Naoaki Yabuuchi
Yokohama National University Yokohama, Japan
Engineering & Technology / Energy Engineering
Energy Storage | Solid-State Chemistry | Batter

Citation Metrics

  • Total
    37,576
  • Last 5 Years
    17,307
  • Last 5 Years / Total
    0.461
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
20,896
World Rank
Japan
268
Country Rank
University of Tokyo Logo
22
University
Ranking Based On Selection:
2
Takayasu Sakurai
University of Tokyo Tokyo, Japan
Engineering & Technology / Energy Engineering
Energy-efficient micro-electronics design | Power electronics | Flexible electronics desig

Citation Metrics

  • Total
    35,335
  • Last 5 Years
    5,383
  • Last 5 Years / Total
    0.152
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
28,141
World Rank
Japan
388
Country Rank
University of Tsukuba Logo
4
University
Ranking Based On Selection:
3
Yutaka Moritomo
University of Tsukuba Tsukuba, Japan
Engineering & Technology / Energy Engineering
energy material | strongly correlated electron syste

Citation Metrics

  • Total
    29,099
  • Last 5 Years
    4,422
  • Last 5 Years / Total
    0.152
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
29,609
World Rank
Japan
418
Country Rank
Toyota Central R&D Labs., Inc Logo
1
University
Ranking Based On Selection:
4
Takeshi Morikawa
Toyota Central R&D Labs., Inc Aichi, Japan
Engineering & Technology / Energy Engineering
photocatalysis | solar energy conversion | energy storage | electrocatalysi

Citation Metrics

  • Total
    28,119
  • Last 5 Years
    7,583
  • Last 5 Years / Total
    0.270
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
29,658
World Rank
Japan
419
Country Rank
University of Hyogo Logo
1
University
Ranking Based On Selection:
5
Seigo Ito
University of Hyogo Kobe, Japan
Engineering & Technology / Energy Engineering
solar cell

Citation Metrics

  • Total
    28,084
  • Last 5 Years
    5,618
  • Last 5 Years / Total
    0.200
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
47,275
World Rank
Japan
703
Country Rank
Kyoto University Logo
59
University
Ranking Based On Selection:
6
Yoshiharu Uchimoto
Kyoto University Kyoto, Japan
Engineering & Technology / Energy Engineering
Battery | Fuel cells | Water electrolysis | Electrochemistry | solid state ionic

Citation Metrics

  • Total
    20,186
  • Last 5 Years
    9,600
  • Last 5 Years / Total
    0.476
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
67,407
World Rank
Japan
1,103
Country Rank
Nagoya Institute of Technology Logo
3
University
Ranking Based On Selection:
7
Tetsuo Soga
Nagoya Institute of Technology Nagoya, Japan
Engineering & Technology / Energy Engineering
Solar cell | Nanomaterial | Photovoltaic

Citation Metrics

  • Total
    15,489
  • Last 5 Years
    4,564
  • Last 5 Years / Total
    0.295
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
77,423
World Rank
Japan
1,317
Country Rank
Ritsumeikan University Logo
5
University
Ranking Based On Selection:
8
Takashi Minemoto
Ritsumeikan University Kyoto, Japan
Engineering & Technology / Energy Engineering
Solar cell | Compound semiconductor | Silicon | Device simulation | PV module-system-outdoor testin

Citation Metrics

  • Total
    13,870
  • Last 5 Years
    9,022
  • Last 5 Years / Total
    0.650
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
77,655
World Rank
Japan
1,319
Country Rank
Nagoya University Logo
64
University
Ranking Based On Selection:
9
Noritaka Usami
Nagoya University Nagoya, Japan
Engineering & Technology / Energy Engineering
Solar Cells | Crystal Growth | Defect Engineering | Materials and Process Informatic

Citation Metrics

  • Total
    13,840
  • Last 5 Years
    4,171
  • Last 5 Years / Total
    0.301
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
79,867
World Rank
Japan
1,363
Country Rank
University of Tokyo Logo
79
University
Ranking Based On Selection:
10
Muhammad Aziz
University of Tokyo Tokyo, Japan
Engineering & Technology / Energy Engineering
Energy Systems | Heat Transfer | Hydrogen/Ammonia Production-Storage-Utilization | Carbon-Free System | Electric Vehicle Utilizatio

Citation Metrics

  • Total
    13,530
  • Last 5 Years
    11,479
  • Last 5 Years / Total
    0.848
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
86,570
World Rank
Japan
1,495
Country Rank
Gifu University Logo
7
University
Ranking Based On Selection:
11
Hiroyuki Fujiwara
Gifu University Gifu, Japan
Engineering & Technology / Energy Engineering
Solar cells | Photovoltaics | Ellipsometry | Optical characterizatio

Citation Metrics

  • Total
    12,669
  • Last 5 Years
    4,710
  • Last 5 Years / Total
    0.372
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
93,046
World Rank
Japan
1,638
Country Rank
Kyoto University Logo
131
University
Ranking Based On Selection:
12
Ben Mclellan
Kyoto University Kyoto, Japan
Engineering & Technology / Energy Engineering
Nexus | Sustainability | Energy | Minerals | Sustainable Desig

Citation Metrics

  • Total
    11,929
  • Last 5 Years
    8,685
  • Last 5 Years / Total
    0.728
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
106,980
World Rank
Japan
1,938
Country Rank
University of Tokyo Logo
98
University
Ranking Based On Selection:
13
Satoshi Uchida
University of Tokyo Tokyo, Japan
Engineering & Technology / Energy Engineering
Solar Cell | Electrochemistry | Material Chemistr

Citation Metrics

  • Total
    10,589
  • Last 5 Years
    1,411
  • Last 5 Years / Total
    0.133
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
129,090
World Rank
Japan
2,410
Country Rank
University of Miyazaki Logo
8
University
Ranking Based On Selection:
14
Kenji Yoshino
University of Miyazaki Miyazaki, Japan
Engineering & Technology / Energy Engineering
Solar Cell | Compound semiconductor | Transparent conducting film | Thermoelectric materia

Citation Metrics

  • Total
    8,969
  • Last 5 Years
    5,206
  • Last 5 Years / Total
    0.580
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
135,971
World Rank
Japan
2,562
Country Rank
Institute of Science Tokyo Logo
78
University
Ranking Based On Selection:
15
Yamada Akira
Institute of Science Tokyo Tokyo, Japan
Engineering & Technology / Energy Engineering
solar cells | semiconductors | Cu(InGa)Se2 | Si | Cu2ZnSnS

Citation Metrics

  • Total
    8,569
  • Last 5 Years
    1,633
  • Last 5 Years / Total
    0.191
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
158,963
World Rank
Japan
3,084
Country Rank
Kyoto University Logo
209
University
Ranking Based On Selection:
16
Tetsuaki Fujihara
Kyoto University Kyoto, Japan
Engineering & Technology / Energy Engineering
Organometallics | Catalysis | Carbon Dioxide | Coordination Chemistr

Citation Metrics

  • Total
    7,405
  • Last 5 Years
    2,993
  • Last 5 Years / Total
    0.404
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
159,325
World Rank
Japan
3,093
Country Rank
Kyoto University Logo
210
University
Ranking Based On Selection:
17
Ryota Sakamoto
Kyoto University Kyoto, Japan
Engineering & Technology / Energy Engineering
chemistr

Citation Metrics

  • Total
    7,388
  • Last 5 Years
    4,213
  • Last 5 Years / Total
    0.570
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
168,741
World Rank
Japan
3,269
Country Rank
Osaka Metropolitan University Logo
27
University
Ranking Based On Selection:
18
Ryohei Yokoyama
Osaka Metropolitan University Osaka, Japan
Engineering & Technology / Energy Engineering
Energy | Energy Systems | Energy Management | Cogeneration | Optimizatio

Citation Metrics

  • Total
    6,989
  • Last 5 Years
    1,980
  • Last 5 Years / Total
    0.283
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
182,211
World Rank
Japan
3,575
Country Rank
Kyoto University Logo
239
University
Ranking Based On Selection:
19
Ishihara Keiichi N
Kyoto University Kyoto, Japan
Engineering & Technology / Energy Engineering
Energy Policy | Environment | Catalysis | Materials | Quasicrysta

Citation Metrics

  • Total
    6,486
  • Last 5 Years
    2,250
  • Last 5 Years / Total
    0.347
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
190,735
World Rank
Japan
3,759
Country Rank
Toyohashi University of Technology Logo
5
University
Ranking Based On Selection:
20
Masanobu Izaki
Toyohashi University of Technology Toyohashi, Japan
Engineering & Technology / Energy Engineering
Energy conversio

Citation Metrics

  • Total
    6,197
  • Last 5 Years
    1,418
  • Last 5 Years / Total
    0.229
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
222,780
World Rank
Japan
4,444
Country Rank
Nagaoka University of Technology Logo
13
University
Ranking Based On Selection:
21
Tadachika Nakayama (中山 忠親)
Nagaoka University of Technology Nagaoka, Japan
Engineering & Technology / Energy Engineering
Ceramics Engineering | Nanotechnology | Power Engineering | Environmental Engineering | Energy engineerin

Citation Metrics

  • Total
    5,283
  • Last 5 Years
    2,164
  • Last 5 Years / Total
    0.410
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
223,686
World Rank
Japan
4,465
Country Rank
Okinawa Institute of Science & Technology Logo
28
University
Ranking Based On Selection:
22
Tongle Bu
Okinawa Institute of Science & Technology Okinawa, Japan
Engineering & Technology / Energy Engineering
Perovskite solar cells | Surface sciences | Crystalline materials | Energy materials and device

Citation Metrics

  • Total
    5,260
  • Last 5 Years
    4,753
  • Last 5 Years / Total
    0.904
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
231,618
World Rank
Japan
4,653
Country Rank
Shimane University Logo
12
University
Ranking Based On Selection:
23
Satoru Okamoto
Shimane University Matsue, Japan
Engineering & Technology / Energy Engineering
energ

Citation Metrics

  • Total
    5,072
  • Last 5 Years
    1,388
  • Last 5 Years / Total
    0.274
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
235,503
World Rank
Japan
4,739
Country Rank
Tokyo University of Science Logo
19
University
Ranking Based On Selection:
24
Ramesh Kumar Petla
Tokyo University of Science Tokyo, Japan
Engineering & Technology / Energy Engineering
Batteries | Solid state ionic

Citation Metrics

  • Total
    4,983
  • Last 5 Years
    2,756
  • Last 5 Years / Total
    0.553
Get Full Access to Premium Data Get Full Access to Premium Data
* Total Citation Counts Rankings

Rankings

flag
258,473
World Rank
Japan
5,186
Country Rank
Okinawa Institute of Science & Technology Logo
35
University
Ranking Based On Selection:
25
Guoqing Tong
Okinawa Institute of Science & Technology Okinawa, Japan
Engineering & Technology / Energy Engineering
solar cells | photodetectors | perovskite thin film | Li-batter

Citation Metrics

  • Total
    4,509
  • Last 5 Years
    4,213
  • Last 5 Years / Total
    0.934
Get Full Access to Premium Data Get Full Access to Premium Data
Smart Institutional Excellence Plan
Unify strategy, analytics, and growth in one powerful platform. Turn academic data into actionable strategy for sustainable excellence.
360° Real-Time Academic Performance Analysis
Track your performance in real time — benchmark, compare, and improve. Stay ahead with instant insights and global peer comparisons.
Strategic Researcher Transfer Tools
Attract world-class talent across 211 disciplines. Find, connect, and recruit the brightest minds worldwide.
Academic Contribution Analytics Module
Unlock researcher and institutional impact with transparent contribution scores. Recognize, measure, and reward academic excellence at every level.
QA & Accreditation
Ensuring quality standards and accreditation compliance in higher education.
Internationalization in Higher Education
Advancing global partnerships, mobility, and international visibility.
Unlock Your Academic Potential Today

🌍 Be Our Partner: Representation & Collaboration

Represent AD Scientific Index in your country or region — and grow with us.

  • ✅ Official recognition as a regional partner
  • ✅ Visibility partnership with full brand support
  • ✅ Help institutions in your region enhance their academic visibility
  • ✅ Contribute to value-driven projects with measurable academic impact
Discover Universities That Trust Us

Discover Universities That Trust Us

Curious about institutions benefiting from the AD Scientific Index?