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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 Score131,357143,547
Total Cites5,2445,763
H-index3637
Hm-index1212
Number of Single Authored Papers44
Total Cites to Single Authored Papers123125
Number of Single+First Authored Papers2727
Total Cites to Single+First Authored Papers1,0311,102
Number of Single+First+Last Authored Papers142142
Total Cites to Single+First+Last Authored Papers3,3553,638
Composite Score33
Number of Distinct Citing Papers4,6925,005
Ratio of Total Citations to Distinct Citing Papers 1.12 1.15
Self-Citation Percentage
9.01%
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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 Score126,782137,030
Total Cites5,0335,554
H-index3536
Hm-index1212
Number of Single Authored Papers44
Total Cites to Single Authored Papers120122
Number of Single+First Authored Papers2727
Total Cites to Single+First Authored Papers9891,060
Number of Single+First+Last Authored Papers142142
Total Cites to Single+First+Last Authored Papers3,2083,491
Composite Score33
Number of Distinct Citing Papers4,5034,818
Ratio of Total Citations to Distinct Citing Papers 1.12 1.15
Self-Citation Percentage
9.38%
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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 Score120,870130,064
Total Cites4,8215,342
H-index3536
Hm-index1212
Number of Single Authored Papers44
Total Cites to Single Authored Papers116118
Number of Single+First Authored Papers2727
Total Cites to Single+First Authored Papers9461,017
Number of Single+First+Last Authored Papers142142
Total Cites to Single+First+Last Authored Papers3,0613,349
Composite Score33
Number of Distinct Citing Papers4,3054,619
Ratio of Total Citations to Distinct Citing Papers 1.12 1.16
Self-Citation Percentage
9.75%
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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 Score113,980124,091
Total Cites4,5755,078
H-index3435
Hm-index1112
Number of Single Authored Papers44
Total Cites to Single Authored Papers113115
Number of Single+First Authored Papers2727
Total Cites to Single+First Authored Papers900966
Number of Single+First+Last Authored Papers141141
Total Cites to Single+First+Last Authored Papers2,9133,186
Composite Score33
Number of Distinct Citing Papers4,0744,382
Ratio of Total Citations to Distinct Citing Papers 1.12 1.16
Self-Citation Percentage
9.91%
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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 Score116,894123,964
Total Cites4,4104,911
H-index3234
Hm-index1112
Number of Single Authored Papers44
Total Cites to Single Authored Papers99101
Number of Single+First Authored Papers2727
Total Cites to Single+First Authored Papers859925
Number of Single+First+Last Authored Papers141141
Total Cites to Single+First+Last Authored Papers2,8203,093
Composite Score33
Number of Distinct Citing Papers3,9274,234
Ratio of Total Citations to Distinct Citing Papers 1.12 1.16
Self-Citation Percentage
10.20%
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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 Score111,372118,055
Total Cites4,1254,608
H-index3133
Hm-index1112
Number of Single Authored Papers44
Total Cites to Single Authored Papers9698
Number of Single+First Authored Papers2828
Total Cites to Single+First Authored Papers815877
Number of Single+First+Last Authored Papers142142
Total Cites to Single+First+Last Authored Papers2,6562,916
Composite Score33
Number of Distinct Citing Papers3,6673,961
Ratio of Total Citations to Distinct Citing Papers 1.12 1.16
Self-Citation Percentage
10.48%
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