Total 2,403,032 scientists, country 221, and institutions 24,466 are evaluated in the Productivity Rankings, an exclusive service provided by AD Scientific Index. This ranking measures and highlights the scientific productivity of researchers based on the i10 index (number of publications with at least 10 citations). This system identifies highly productive scientists across disciplines, institutions, and regions, contributing to the development of evidence-based academic policies and effective incentive mechanisms. The rankings include global, regional, and institutional analyses, along with specialized rankings such as Scientists' Last 6 Years' i10 Index and Universities' i10 Index Rankings 2025. With Premium Membership, you can:
- Gain full access to detailed comparisons and advanced analytics,
- Objectively evaluate your academic productivity,
- Make strategic, data-driven decisions to enhance performance.
* Total i10 IndexRankings
Ranking Based On Selection: 1
![Takao Shimizu](https://cdn.adscientificindex.com/pictures/50/4606505.jpg)
lipid biology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
587
276
0.470
* Total i10 IndexRankings
Ranking Based On Selection: 2
![Norio Ohmagari](/user/assets/images/profile/no-profile-photo.png)
Infectious Diseases
Infection Prevention and control
and Emerging Infectious Diseases
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
264
219
0.830
* Total i10 IndexRankings
Ranking Based On Selection: 3
![Tatsuya Kanto](https://cdn.adscientificindex.com/pictures/86/4606490.jpg)
Hepatology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
173
103
0.595
* Total i10 IndexRankings
Ranking Based On Selection: 4
![Masaya Sugiyama](/user/assets/images/profile/no-profile-photo.png)
感染症
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
129
97
0.752
* Total i10 IndexRankings
Ranking Based On Selection: 5
![Takuya Awata](https://cdn.adscientificindex.com/pictures/4e/411153.jpg)
Pancreas/Islet Transplantation
Prevention of Type 1 Diabetes
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
110
49
0.445
* Total i10 IndexRankings
Ranking Based On Selection: 6
![Keiyo Takubo](https://cdn.adscientificindex.com/pictures/35/4606467.jpg)
stem cell biology
hematology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
95
74
0.779
* Total i10 IndexRankings
Ranking Based On Selection: 7
![Masayuki Shimoda](/user/assets/images/profile/no-profile-photo.png)
islet transplantation
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
66
28
0.424
* Total i10 IndexRankings
Ranking Based On Selection: 8
![Eiko Saito](https://cdn.adscientificindex.com/pictures/f9/4606410.jpg)
Health Economics
Epidemiology
Global Health
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
61
60
0.984
* Total i10 IndexRankings
Ranking Based On Selection: 9
![Masahiro Ishikane 石金正裕](https://cdn.adscientificindex.com/pictures/c9/4606381.jpg)
Infectious Disease
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
54
51
0.944
* Total i10 IndexRankings
Ranking Based On Selection: 10
![Yosuke Inoue](https://cdn.adscientificindex.com/pictures/dc/4606351.jpg)
Human Biology
Social Epidemiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
37
0.860
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 i10 IndexRankings
Ranking Based On Selection: 11
![Mugen Ujiie](https://cdn.adscientificindex.com/pictures/4b/4606360.jpg)
immunization
travel medicine
tropical medicine
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
36
29
0.806
* Total i10 IndexRankings
Ranking Based On Selection: 12
![Toshi Kobayashi](/user/assets/images/profile/no-profile-photo.png)
Immunology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
35
12
0.343
* Total i10 IndexRankings
Ranking Based On Selection: 13
![Masatoshi Hotta](https://cdn.adscientificindex.com/pictures/98/4606312.jpg)
Radiology
Nuclear Medicine
Theranostics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
23
1.000
* Total i10 IndexRankings
Ranking Based On Selection: 14
![Yoshiki Kusama](https://cdn.adscientificindex.com/pictures/fe/4606256.jpg)
Pediatric Infectious Diseases
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
19
0.950
* Total i10 IndexRankings
Ranking Based On Selection: 15
![Takamatsu Yuki](/user/assets/images/profile/no-profile-photo.png)
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
15
0.833
* Total i10 IndexRankings
Ranking Based On Selection: 16
![Motoyuki Tsuboi 坪井基行](/user/assets/images/profile/no-profile-photo.png)
Emerging Infectious disease
sexually transmitted infections
tropical/travel medicine
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
15
0.882
* Total i10 IndexRankings
Ranking Based On Selection: 17
![Mari Tenno](/user/assets/images/profile/no-profile-photo.png)
免疫細胞分化、疾患発症
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
11
0.647
* Total i10 IndexRankings
Ranking Based On Selection: 18
![Kozo Miyazaki](/user/assets/images/profile/no-profile-photo.png)
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
15
7
0.467
* Total i10 IndexRankings
Ranking Based On Selection: 19
![Dong Vh](https://cdn.adscientificindex.com/pictures/06/4606310.jpg)
Medical Epidemiology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
14
11
0.786
* Total i10 IndexRankings
Ranking Based On Selection: 20
![Alafate Ayibieke](/user/assets/images/profile/no-profile-photo.png)
Antibiotic resistance
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
10
10
1.000
* Total i10 IndexRankings
Ranking Based On Selection: 21
![Gen Yamada](/user/assets/images/profile/no-profile-photo.png)
infectious disease
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
8
1.000
* Total i10 IndexRankings
Ranking Based On Selection: 22
![Yutaka Handa](/user/assets/images/profile/no-profile-photo.png)
infection
immunity
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
6
0.750
* Total i10 IndexRankings
Ranking Based On Selection: 23
![Mayumi Okamoto](/user/assets/images/profile/no-profile-photo.png)
ケミカルバイオロジー PET化学 免疫
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
6
0.750
* Total i10 IndexRankings
Ranking Based On Selection: 24
![Yunfei Li](https://cdn.adscientificindex.com/pictures/a7/4854123.jpg)
Clinical Epidemiology
Health Economics
Health Intervention
Gerontology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
3
3
1.000
* Total i10 IndexRankings
Ranking Based On Selection: 25
![Motoyoshi Nagai](/user/assets/images/profile/no-profile-photo.png)
immunometabolism
mucosal immunology
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
3
3
1.000
Takao Shimizu
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
587
276
0.470
Norio Ohmagari
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
264
219
0.830
Infectious Diseases
Infection Prevention and control
and Emerging Infectious Diseases
Tatsuya Kanto
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
173
103
0.595
Masaya Sugiyama
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
129
97
0.752
Takuya Awata
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
110
49
0.445
Keiyo Takubo
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
95
74
0.779
stem cell biology
hematology
Masayuki Shimoda
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
66
28
0.424
Eiko Saito
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
61
60
0.984
Health Economics
Epidemiology
Global Health
Masahiro Ishikane 石金正裕
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
54
51
0.944
Yosuke Inoue
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
43
37
0.860
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!
Mugen Ujiie
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
36
29
0.806
Toshi Kobayashi
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
35
12
0.343
Masatoshi Hotta
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
23
23
1.000
Radiology
Nuclear Medicine
Theranostics
Yoshiki Kusama
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
19
0.950
Pediatric Infectious Diseases
Takamatsu Yuki
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
18
15
0.833
Motoyuki Tsuboi 坪井基行
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
15
0.882
Emerging Infectious disease
sexually transmitted infections
tropical/travel medicine
Mari Tenno
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
17
11
0.647
Kozo Miyazaki
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
15
7
0.467
Dong Vh
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
14
11
0.786
Alafate Ayibieke
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
10
10
1.000
Antibiotic resistance
Gen Yamada
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
8
1.000
Yutaka Handa
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
6
0.750
Mayumi Okamoto
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
8
6
0.750
Yunfei Li
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
3
3
1.000
Clinical Epidemiology
Health Economics
Health Intervention
Gerontology
Motoyoshi Nagai
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
3
3
1.000