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Manabu Okumura

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Computer Science 35 11579 11248 173 165 361 6191

Manabu Okumura publications per year

The chart shows the history of publications by Manabu Okumura between 1956 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Manabu Okumura published across 71 years, from 1956 to 2026, averaging 6.6 papers a year. Output peaked at 42 publications in 2024. 30 of the 471 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1956 to 2026. Vertical axis: number of publications, 0 to 42. Peak 42 publications in 2024. 1956: 1 publication 1957: 0 publications 1958: 0 publications 1959: 0 publications 1960: 0 publications 1961: 0 publications 1962: 0 publications 1963: 2 publications 1964: 1 publication 1965: 0 publications 1966: 0 publications 1967: 1 publication 1968: 0 publications 1969: 0 publications 1970: 0 publications 1971: 0 publications 1972: 0 publications 1973: 0 publications 1974: 1 publication 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 0 publications 1984: 1 publication 1985: 0 publications 1986: 1 publication 1987: 0 publications 1988: 1 publication 1989: 1 publication 1990: 3 publications 1991: 2 publications 1992: 2 publications 1993: 1 publication 1994: 2 publications 1995: 2 publications 1996: 4 publications 1997: 3 publications 1998: 6 publications 1999: 6 publications 2000: 7 publications 2001: 3 publications 2002: 3 publications 2003: 10 publications 2004: 20 publications 2005: 20 publications 2006: 24 publications 2007: 13 publications 2008: 17 publications 2009: 16 publications 2010: 17 publications 2011: 20 publications 2012: 15 publications 2013: 10 publications 2014: 7 publications 2015: 10 publications 2016: 11 publications 2017: 14 publications 2018: 6 publications 2019: 18 publications 2020: 25 publications 2021: 29 publications 2022: 15 publications 2023: 28 publications 2024: 42 publications 2025: 28 publications 2026: 2 publications
1956 2026

471 publications in total across all disciplines

View publications per year as a table
Manabu Okumura: publications per year, 1956 to 2026
Year Publications
1956 1
1957 0
1958 0
1959 0
1960 0
1961 0
1962 0
1963 2
1964 1
1965 0
1966 0
1967 1
1968 0
1969 0
1970 0
1971 0
1972 0
1973 0
1974 1
1975 0
1976 0
1977 0
1978 0
1979 0
1980 0
1981 0
1982 0
1983 0
1984 1
1985 0
1986 1
1987 0
1988 1
1989 1
1990 3
1991 2
1992 2
1993 1
1994 2
1995 2
1996 4
1997 3
1998 6
1999 6
2000 7
2001 3
2002 3
2003 10
2004 20
2005 20
2006 24
2007 13
2008 17
2009 16
2010 17
2011 20
2012 15
2013 10
2014 7
2015 10
2016 11
2017 14
2018 6
2019 18
2020 25
2021 29
2022 15
2023 28
2024 42
2025 28
2026 2
Total 471
Download as CSV

Manabu Okumura publication distribution in Computer Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Computer Science in 2026. The highlighted bar marks where Manabu Okumura sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 97 bars. Horizontal axis: publications, 32–41 to 991+. Vertical axis: number of scientists, 0 to 609. Most scientists, 609, have 142–151 publications. The last bar groups every scientist with 991 publications or more. The highlighted bar, 352–361 publications, is where this scientist sits. 32–41 publications: 7 scientists 42–51 publications: 22 scientists 52–61 publications: 82 scientists 62–71 publications: 134 scientists 72–81 publications: 249 scientists 82–91 publications: 324 scientists 92–101 publications: 421 scientists 102–111 publications: 420 scientists 112–121 publications: 497 scientists 122–131 publications: 544 scientists 132–141 publications: 555 scientists 142–151 publications: 609 scientists 152–161 publications: 559 scientists 162–171 publications: 534 scientists 172–181 publications: 556 scientists 182–191 publications: 583 scientists 192–201 publications: 519 scientists 202–211 publications: 508 scientists 212–221 publications: 490 scientists 222–231 publications: 437 scientists 232–241 publications: 423 scientists 242–251 publications: 408 scientists 252–261 publications: 377 scientists 262–271 publications: 301 scientists 272–281 publications: 335 scientists 282–291 publications: 320 scientists 292–301 publications: 293 scientists 302–311 publications: 250 scientists 312–321 publications: 238 scientists 322–331 publications: 206 scientists 332–341 publications: 209 scientists 342–351 publications: 208 scientists 352–361 publications: 162 scientists 362–371 publications: 176 scientists 372–381 publications: 127 scientists 382–391 publications: 158 scientists 392–401 publications: 128 scientists 402–411 publications: 104 scientists 412–421 publications: 94 scientists 422–431 publications: 99 scientists 432–441 publications: 83 scientists 442–451 publications: 108 scientists 452–461 publications: 73 scientists 462–471 publications: 77 scientists 472–481 publications: 69 scientists 482–491 publications: 84 scientists 492–501 publications: 62 scientists 502–511 publications: 54 scientists 512–521 publications: 57 scientists 522–531 publications: 51 scientists 532–541 publications: 51 scientists 542–551 publications: 32 scientists 552–561 publications: 38 scientists 562–571 publications: 28 scientists 572–581 publications: 43 scientists 582–591 publications: 33 scientists 592–601 publications: 41 scientists 602–611 publications: 32 scientists 612–621 publications: 28 scientists 622–631 publications: 25 scientists 632–641 publications: 27 scientists 642–651 publications: 17 scientists 652–661 publications: 20 scientists 662–671 publications: 17 scientists 672–681 publications: 15 scientists 682–691 publications: 14 scientists 692–701 publications: 21 scientists 702–711 publications: 13 scientists 712–721 publications: 12 scientists 722–731 publications: 19 scientists 732–741 publications: 14 scientists 742–751 publications: 12 scientists 752–761 publications: 10 scientists 762–771 publications: 10 scientists 772–781 publications: 11 scientists 782–791 publications: 10 scientists 792–801 publications: 11 scientists 802–811 publications: 8 scientists 812–821 publications: 8 scientists 822–831 publications: 7 scientists 832–841 publications: 11 scientists 842–851 publications: 10 scientists 852–861 publications: 5 scientists 862–871 publications: 9 scientists 872–881 publications: 4 scientists 882–891 publications: 6 scientists 892–901 publications: 3 scientists 902–911 publications: 6 scientists 912–921 publications: 3 scientists 922–931 publications: 2 scientists 932–941 publications: 2 scientists 942–951 publications: 2 scientists 952–961 publications: 3 scientists 962–971 publications: 3 scientists 972–981 publications: 3 scientists 982–990 publications: 5 scientists 991+ publications: 100 scientists
32–41 publications 991+

This scientist: 361 publications — 83rd percentile

83% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 991 publications or more.

View publications distribution as a table
Number of Computer Science scientists by publication count, Research.com 2026 ranking edition. Based on 14,188 ranked scientists.
Publications Scientists This scientist
32–41 7
42–51 22
52–61 82
62–71 134
72–81 249
82–91 324
92–101 421
102–111 420
112–121 497
122–131 544
132–141 555
142–151 609
152–161 559
162–171 534
172–181 556
182–191 583
192–201 519
202–211 508
212–221 490
222–231 437
232–241 423
242–251 408
252–261 377
262–271 301
272–281 335
282–291 320
292–301 293
302–311 250
312–321 238
322–331 206
332–341 209
342–351 208
352–361 162 361
362–371 176
372–381 127
382–391 158
392–401 128
402–411 104
412–421 94
422–431 99
432–441 83
442–451 108
452–461 73
462–471 77
472–481 69
482–491 84
492–501 62
502–511 54
512–521 57
522–531 51
532–541 51
542–551 32
552–561 38
562–571 28
572–581 43
582–591 33
592–601 41
602–611 32
612–621 28
622–631 25
632–641 27
642–651 17
652–661 20
662–671 17
672–681 15
682–691 14
692–701 21
702–711 13
712–721 12
722–731 19
732–741 14
742–751 12
752–761 10
762–771 10
772–781 11
782–791 10
792–801 11
802–811 8
812–821 8
822–831 7
832–841 11
842–851 10
852–861 5
862–871 9
872–881 4
882–891 6
892–901 3
902–911 6
912–921 3
922–931 2
932–941 2
942–951 2
952–961 3
962–971 3
972–981 3
982–990 5
991+ 100
Download as CSV

Manabu Okumura D-index placement in Computer Science in 2026

The chart shows the D-index (discipline H-index) distribution of Computer Science scientists ranked by Research.com in 2026. The highlighted bar marks where Manabu Okumura sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 52 bars. Horizontal axis: D-Index, 30–31 to 131+. Vertical axis: number of scientists, 0 to 990. Most scientists, 990, have 36–37 D-Index. The last bar groups every scientist with 131 D-Index or more. The highlighted bar, 34–35 D-Index, is where this scientist sits. 30–31 D-Index: 879 scientists 32–33 D-Index: 983 scientists 34–35 D-Index: 918 scientists 36–37 D-Index: 990 scientists 38–39 D-Index: 968 scientists 40–41 D-Index: 907 scientists 42–43 D-Index: 821 scientists 44–45 D-Index: 763 scientists 46–47 D-Index: 689 scientists 48–49 D-Index: 543 scientists 50–51 D-Index: 543 scientists 52–53 D-Index: 518 scientists 54–55 D-Index: 500 scientists 56–57 D-Index: 458 scientists 58–59 D-Index: 400 scientists 60–61 D-Index: 337 scientists 62–63 D-Index: 308 scientists 64–65 D-Index: 292 scientists 66–67 D-Index: 249 scientists 68–69 D-Index: 213 scientists 70–71 D-Index: 192 scientists 72–73 D-Index: 189 scientists 74–75 D-Index: 165 scientists 76–77 D-Index: 139 scientists 78–79 D-Index: 119 scientists 80–81 D-Index: 121 scientists 82–83 D-Index: 113 scientists 84–85 D-Index: 88 scientists 86–87 D-Index: 87 scientists 88–89 D-Index: 75 scientists 90–91 D-Index: 69 scientists 92–93 D-Index: 57 scientists 94–95 D-Index: 46 scientists 96–97 D-Index: 38 scientists 98–99 D-Index: 34 scientists 100–101 D-Index: 36 scientists 102–103 D-Index: 27 scientists 104–105 D-Index: 37 scientists 106–107 D-Index: 18 scientists 108–109 D-Index: 31 scientists 110–111 D-Index: 19 scientists 112–113 D-Index: 16 scientists 114–115 D-Index: 12 scientists 116–117 D-Index: 20 scientists 118–119 D-Index: 15 scientists 120–121 D-Index: 5 scientists 122–123 D-Index: 20 scientists 124–125 D-Index: 8 scientists 126–127 D-Index: 5 scientists 128–129 D-Index: 7 scientists 130 D-Index: 3 scientists 131+ D-Index: 98 scientists
30–31 D-Index 131+

This scientist: 35 D-Index — 20th percentile

20% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 131 D-Index or more.

View D-Index distribution as a table
Number of Computer Science scientists by D-index, Research.com 2026 ranking edition. Based on 14,188 ranked scientists.
D-Index Scientists This scientist
30–31 879
32–33 983
34–35 918 35
36–37 990
38–39 968
40–41 907
42–43 821
44–45 763
46–47 689
48–49 543
50–51 543
52–53 518
54–55 500
56–57 458
58–59 400
60–61 337
62–63 308
64–65 292
66–67 249
68–69 213
70–71 192
72–73 189
74–75 165
76–77 139
78–79 119
80–81 121
82–83 113
84–85 88
86–87 87
88–89 75
90–91 69
92–93 57
94–95 46
96–97 38
98–99 34
100–101 36
102–103 27
104–105 37
106–107 18
108–109 31
110–111 19
112–113 16
114–115 12
116–117 20
118–119 15
120–121 5
122–123 20
124–125 8
126–127 5
128–129 7
130 3
131+ 98
Download as CSV

Best Publications

  • Extracting Semantic Orientations of Words using Spin Model

    Hiroya Takamura;Takashi Inui;Manabu Okumura

  • FlexMatch: Boosting Semi-Supervised Learning with Curriculum Pseudo Labeling

    Bowen Zhang;Yidong Wang;Wenxin Hou;Hao Wu

  • FlexMatch: Boosting Semi-Supervised Learning with Curriculum Pseudo Labeling

    Bowen Zhang;Yidong Wang;Wenxin Hou;Hao Wu

  • Sentiment classification using word sub-sequences and dependency sub-trees

    Shotaro Matsumoto;Hiroya Takamura;Manabu Okumura

  • Proceedings of the 16th Conference of the European Chapter of the Association for Computational Linguistics: Main Volume

    Unknown

  • Towards Multi-paper Summarization Using Reference Information

    Hidetsugu Nanba;Manabu Okumura

  • Controlling Output Length in Neural Encoder-Decoders

    Yuta Kikuchi;Graham Neubig;Ryohei Sasano;Hiroya Takamura

  • Text Summarization Model Based on Maximum Coverage Problem and its Variant

    Hiroya Takamura;Manabu Okumura

  • Classification of research papers using citation links and citation types: Towards automatic review article generation.

    Hidetsugu Nanba;Noriko Kando;Manabu Okumura

  • Patent Claim Processing for Readability - Structure Analysis and Term Explanation

    Akihiro Shinmori;Manabu Okumura;Yuzo Marukawa;Makoto Iwayama

  • Learning to Shift the Polarity of Words for Sentiment Classification

    Daisuke Ikeda;Hiroya Takamura;Lev-Arie Ratinov;Manabu Okumura

  • Latent Variable Models for Semantic Orientations of Phrases

    Hiroya Takamura;Takashi Inui;Manabu Okumura

  • Summarizing a Document Stream

    Hiroya Takamura;Hikaru Yokono;Manabu Okumura

  • Word sense disambiguation and text segmentation based on lexical cohesion

    Unknown

  • Extracting Semantic Orientations of Phrases from Dictionary

    Hiroya Takamura;Takashi Inui;Manabu Okumura

  • Automatically collecting, monitoring, and mining japanese weblogs

    Tomoyuki Nanno;Toshiaki Fujiki;Yasuhiro Suzuki;Manabu Okumura

  • Single Document Summarization based on Nested Tree Structure

    Yuta Kikuchi;Tsutomu Hirao;Hiroya Takamura;Manabu Okumura

  • A Survey on Deep Active Learning: Recent Advances and New Frontiers

    Unknown

  • Semi-supervised learning for blog classification

    Daisuke Ikeda;Hiroya Takamura;Manabu Okumura

  • Classification of multiple-sentence questions

    Akihiro Tamura;Hiroya Takamura;Manabu Okumura

Frequent Co-Authors

Eiichiro Sumita
Eiichiro Sumita National Institute of Information and Communications Technology
Naoki Kobayashi
Naoki Kobayashi University of Tokyo
Sadao Kurohashi
Sadao Kurohashi Kyoto University
Sivaji Bandyopadhyay
Sivaji Bandyopadhyay Jadavpur University
Pablo Castells
Pablo Castells Autonomous University of Madrid
Tetsuya Sakai
Tetsuya Sakai Waseda University
Hsin-Hsi Chen
Hsin-Hsi Chen National Taiwan University
Naoaki Okazaki
Naoaki Okazaki Tokyo Institute of Technology
Graham Neubig
Graham Neubig Carnegie Mellon University
Kentaro Inui
Kentaro Inui Tohoku University

External Links

Personal website of Manabu Okumura

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Best Scientists Citing Manabu Okumura

Dragomir R. Radev

Dragomir R. Radev

Yale University

Publications: 34

Bing Liu

Bing Liu

University of Illinois at Chicago

Publications: 23

Noriko Kando

Noriko Kando

National Institute of Informatics

Publications: 20

Simone Teufel

Simone Teufel

University of Cambridge

Publications: 15

Fuji Ren

Fuji Ren

University of Electronic Science and Technology of China

Publications: 15

Kentaro Inui

Kentaro Inui

Tohoku University

Publications: 15

Graham Neubig

Graham Neubig

Carnegie Mellon University

Publications: 14

Janyce Wiebe

Janyce Wiebe

University of Pittsburgh

Publications: 13

Xiaojun Wan

Xiaojun Wan

Peking University

Publications: 13

Yuji Matsumoto

Yuji Matsumoto

Nara Institute of Science and Technology

Publications: 12

Saif M. Mohammad

Saif M. Mohammad

National Research Council Canada

Publications: 11

Naoaki Okazaki

Naoaki Okazaki

Tokyo Institute of Technology

Publications: 11

Sadao Kurohashi

Sadao Kurohashi

Kyoto University

Publications: 11

Tao Li

Tao Li

Florida International University

Publications: 10

Yusuke Miyao

Yusuke Miyao

University of Tokyo

Publications: 9

Pushpak Bhattacharyya

Pushpak Bhattacharyya

Indian Institute of Technology Patna

Publications: 9

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