Koyama, Akio
University of Tsukuba,
Japan
2025 Rank: 131,357
Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Clinical Medicine
SubField 1:
Urology & Nephrology
SubField 2:
General & Internal Medicine
Rank in SubField 1: 1,389 out of 92,052 Researchers
Data For The Year: 2025
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 131,357 | 143,547 |
| Total Cites | 5,244 | 5,763 |
| H-index | 36 | 37 |
| Hm-index | 12 | 12 |
| Number of Single Authored Papers | 4 | 4 |
| Total Cites to Single Authored Papers | 123 | 125 |
| Number of Single+First Authored Papers | 27 | 27 |
| Total Cites to Single+First Authored Papers | 1,031 | 1,102 |
| Number of Single+First+Last Authored Papers | 142 | 142 |
| Total Cites to Single+First+Last Authored Papers | 3,355 | 3,638 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 4,692 | 5,005 |
| Ratio of Total Citations to Distinct Citing Papers | 1.12 | 1.15 |
| Self-Citation Percentage |
9.01%
|
|
Koyama, Akio
University of Tsukuba,
Japan
2024 Rank: 126,782
Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Clinical Medicine
SubField 1:
Urology & Nephrology
SubField 2:
General & Internal Medicine
Rank in SubField 1: 1,342 out of 87,532 Researchers
Data For The Year: 2024
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 126,782 | 137,030 |
| Total Cites | 5,033 | 5,554 |
| H-index | 35 | 36 |
| Hm-index | 12 | 12 |
| Number of Single Authored Papers | 4 | 4 |
| Total Cites to Single Authored Papers | 120 | 122 |
| Number of Single+First Authored Papers | 27 | 27 |
| Total Cites to Single+First Authored Papers | 989 | 1,060 |
| Number of Single+First+Last Authored Papers | 142 | 142 |
| Total Cites to Single+First+Last Authored Papers | 3,208 | 3,491 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 4,503 | 4,818 |
| Ratio of Total Citations to Distinct Citing Papers | 1.12 | 1.15 |
| Self-Citation Percentage |
9.38%
|
|
Koyama, Akio
University of Tsukuba,
Japan
2023 Rank: 120,870
Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Clinical Medicine
SubField 1:
Urology & Nephrology
SubField 2:
General & Internal Medicine
Rank in SubField 1: 1,304 out of 82,885 Researchers
Data For The Year: 2023
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 120,870 | 130,064 |
| Total Cites | 4,821 | 5,342 |
| H-index | 35 | 36 |
| Hm-index | 12 | 12 |
| Number of Single Authored Papers | 4 | 4 |
| Total Cites to Single Authored Papers | 116 | 118 |
| Number of Single+First Authored Papers | 27 | 27 |
| Total Cites to Single+First Authored Papers | 946 | 1,017 |
| Number of Single+First+Last Authored Papers | 142 | 142 |
| Total Cites to Single+First+Last Authored Papers | 3,061 | 3,349 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 4,305 | 4,619 |
| Ratio of Total Citations to Distinct Citing Papers | 1.12 | 1.16 |
| Self-Citation Percentage |
9.75%
|
|
Koyama, Akio
University of Tsukuba,
Japan
2022 Rank: 113,980
Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Clinical Medicine
SubField 1:
Urology & Nephrology
SubField 2:
General & Internal Medicine
Rank in SubField 1: 1,253 out of 79,729 Researchers
Data For The Year: 2022
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 113,980 | 124,091 |
| Total Cites | 4,575 | 5,078 |
| H-index | 34 | 35 |
| Hm-index | 11 | 12 |
| Number of Single Authored Papers | 4 | 4 |
| Total Cites to Single Authored Papers | 113 | 115 |
| Number of Single+First Authored Papers | 27 | 27 |
| Total Cites to Single+First Authored Papers | 900 | 966 |
| Number of Single+First+Last Authored Papers | 141 | 141 |
| Total Cites to Single+First+Last Authored Papers | 2,913 | 3,186 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 4,074 | 4,382 |
| Ratio of Total Citations to Distinct Citing Papers | 1.12 | 1.16 |
| Self-Citation Percentage |
9.91%
|
|
Koyama, Akio
University of Tsukuba,
Japan
2021 Rank: 116,894
Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Clinical Medicine
SubField 1:
Urology & Nephrology
SubField 2:
General & Internal Medicine
Rank in SubField 1: 1,262 out of 76,322 Researchers
Data For The Year: 2021
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 116,894 | 123,964 |
| Total Cites | 4,410 | 4,911 |
| H-index | 32 | 34 |
| Hm-index | 11 | 12 |
| Number of Single Authored Papers | 4 | 4 |
| Total Cites to Single Authored Papers | 99 | 101 |
| Number of Single+First Authored Papers | 27 | 27 |
| Total Cites to Single+First Authored Papers | 859 | 925 |
| Number of Single+First+Last Authored Papers | 141 | 141 |
| Total Cites to Single+First+Last Authored Papers | 2,820 | 3,093 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 3,927 | 4,234 |
| Ratio of Total Citations to Distinct Citing Papers | 1.12 | 1.16 |
| Self-Citation Percentage |
10.20%
|
|
Koyama, Akio
University of Tsukuba,
Japan
2020 Rank: 111,372
Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:
Clinical Medicine
SubField 1:
Urology & Nephrology
SubField 2:
Biochemistry & Molecular Biology
Rank in SubField 1: 1,275 out of 64,516 Researchers
Data For The Year: 2020
| Metrics | Self-Citations Excluded | All |
|---|---|---|
| Rank Based on Composite Score | 111,372 | 118,055 |
| Total Cites | 4,125 | 4,608 |
| H-index | 31 | 33 |
| Hm-index | 11 | 12 |
| Number of Single Authored Papers | 4 | 4 |
| Total Cites to Single Authored Papers | 96 | 98 |
| Number of Single+First Authored Papers | 28 | 28 |
| Total Cites to Single+First Authored Papers | 815 | 877 |
| Number of Single+First+Last Authored Papers | 142 | 142 |
| Total Cites to Single+First+Last Authored Papers | 2,656 | 2,916 |
| Composite Score | 3 | 3 |
| Number of Distinct Citing Papers | 3,667 | 3,961 |
| Ratio of Total Citations to Distinct Citing Papers | 1.12 | 1.16 |
| Self-Citation Percentage |
10.48%
|
|
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