Universities by Research i10-index in Japan
Universities and colleges ranked by OpenAlex's institutional i10-index, the number of works with at least ten citations. This is a research metric, not a measure of teaching quality. OpenAlex is an open scholarly index; larger and older institutions tend to have more indexed research.
1The University of Tokyo601,130 works
702,471
2Kyoto University402,272 works
458,001
3The University of Osaka329,104 works
431,032
4Tohoku University305,246 works
349,018
5Kyushu University255,546 works
274,605
6Nagoya University318,350 works
272,058
7Hokkaido University275,579 works
233,179
8Tokyo Institute of Technology180,329 works
176,766
9University of Tsukuba150,063 works
157,917
10Hiroshima University128,503 works
141,793
11Keio University137,895 works
141,783
12Kobe University104,240 works
121,017
13Chiba University99,351 works
116,992
14Okayama University103,126 works
115,914
15Kanazawa University76,435 works
88,503
16Tokyo Medical and Dental University61,992 works
84,378
17Kumamoto University64,355 works
84,032
18Niigata University65,782 works
71,938
19Nagasaki University58,446 works
70,941
20Osaka City University60,528 works
68,935
21Waseda University100,262 works
67,872
22Tokushima University53,060 works
67,705
23Juntendo University50,639 works
60,415
24Shinshu University58,135 works
60,180
25Nihon University78,331 works
59,648
26Gunma University52,488 works
56,792
27Gifu University50,993 works
55,514
28Kyoto Prefectural University of Medicine33,744 works
51,680
29Kitasato University42,398 works
51,304
30Tokyo University of Science65,523 works
51,228
31Kagoshima University50,099 works
51,115
32Yokohama City University38,756 works
50,204
33University of Toyama44,093 works
48,894
34Kindai University55,906 works
47,287
35Yamaguchi University50,418 works
46,604
36Ehime University44,387 works
46,032
37Shizuoka University47,631 works
44,147
38Tokyo Women's Medical University39,947 works
43,901
39Mie University38,973 works
43,405
40Nagoya City University33,049 works
42,851
41Jichi Medical University32,974 works
42,231
42Tokyo University of Agriculture and Technology44,575 works
41,281
43Osaka Prefecture University44,444 works
40,262
44Tokai University51,476 works
38,246
45Sapporo Medical University25,586 works
37,289
46Tottori University36,147 works
36,500
47Yamagata University39,327 works
36,359
48Tokyo Metropolitan University53,814 works
36,325
49Kurume University28,898 works
34,582
50Nippon Medical School34,855 works
34,571
Highlights
Within Japan, The University of Tokyo ranks first in 2026 with 702,471, followed by Kyoto University (458,001) and The University of Osaka (431,032).
The University of Tokyo is 1.5 times higher than Kyoto University, the runner-up.
Across 50 entries, values run from 702,471 (The University of Tokyo) to 34,571 (Nippon Medical School), with a median of 58,220.
Source: OpenAlex, institutional Research i10-index, 2026. Unit: i10-index.
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