Productivity Rankings is a unique service offered only by “AD Scientific Index”. This is a ranking system derived from the i10 index in order to show the productivity of the scientist in publishing scientific articles of value. Productivity Rankings is an instrument that lists productive scientists in a given area, discipline, university, and country and can guide the development of meaningful incentives and academic policies. The world rankings, regional rankings, and university rankings of scientists in this table are developed based on the total i10 index. Click for "last 6 years' i10 index". Also see: Universities Rankings 2024 (Sort by : Total i10 Index) and Universities Rankings 2024 (Sort by : Last 6 Years i10 Index)
* Total i10 Index Rankings
World Rank
30,615
Country Rank
774
Institution Rank : 4
![](https://cdn.adscientificindex.com/logos/29411.jpg)
![Japan](/flags/jp.png)
![Ken-ichi Kawarabayashi](/user/assets/images/profile/no-profile-photo.png)
Graph Theory
Graph Algorithms
Combinatorics
Discrete Mathematics
Combinatorial optimization
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
204
116
0.569
* Total i10 Index Rankings
World Rank
362,555
Country Rank
8,270
Institution Rank : 36
![](https://cdn.adscientificindex.com/logos/29411.jpg)
![Japan](/flags/jp.png)
![Ken Hayami](/user/assets/images/profile/no-profile-photo.png)
Numerical Linear Algebra
Numerical Analysis
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
14
0.359
* Total i10 Index Rankings
World Rank
1,352,537
Country Rank
24,957
Institution Rank : 12
![](https://cdn.adscientificindex.com/logos/15934.jpg)
![Japan](/flags/jp.png)
![Kazu Ghalamkari](/pictures/a3/4624283.jpg)
tensor decomposition
nonnegative matrix factorization
machine learning
information geometry
statistical physics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
3
3
1.000
* Total i10 Index Rankings
World Rank
1,570,943
Country Rank
28,241
Institution Rank : 123
![](https://cdn.adscientificindex.com/logos/29411.jpg)
![Japan](/flags/jp.png)
![Tomoya Machide](/user/assets/images/profile/no-profile-photo.png)
Number theory (Multiple zeta)
Logic (Boolean satisfiability)
NLP (Word embedding)
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
2
1
0.500
* Total i10 Index Rankings
Rankings
![](/assets/images/world-icon.png)
30,615
![Japan](/flags/jp.png)
774
![](https://cdn.adscientificindex.com/logos/29411.jpg)
4
Ken-ichi Kawarabayashi
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
204
116
0.569
![](https://cdn.adscientificindex.com/logos/29411.jpg)
Graph Theory
Graph Algorithms
Combinatorics
Discrete Mathematics
Combinatorial optimization
* Total i10 Index Rankings
Rankings
![](/assets/images/world-icon.png)
362,555
![Japan](/flags/jp.png)
8,270
![](https://cdn.adscientificindex.com/logos/29411.jpg)
36
Ken Hayami
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
39
14
0.359
![](https://cdn.adscientificindex.com/logos/29411.jpg)
Numerical Linear Algebra
Numerical Analysis
* Total i10 Index Rankings
Rankings
![](/assets/images/world-icon.png)
1,352,537
![Japan](/flags/jp.png)
24,957
![](https://cdn.adscientificindex.com/logos/15934.jpg)
12
Kazu Ghalamkari
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
3
3
1.000
![](https://cdn.adscientificindex.com/logos/15934.jpg)
tensor decomposition
nonnegative matrix factorization
machine learning
information geometry
statistical physics
* Total i10 Index Rankings
Rankings
![](/assets/images/world-icon.png)
1,570,943
![Japan](/flags/jp.png)
28,241
![](https://cdn.adscientificindex.com/logos/29411.jpg)
123
Tomoya Machide
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
2
1
0.500
![](https://cdn.adscientificindex.com/logos/29411.jpg)
Number theory (Multiple zeta)
Logic (Boolean satisfiability)
NLP (Word embedding)