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Mathematics
Japan
2026
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Computer Science
Japan
2025

D-Index & Metrics

Mathematics

D-Index
63
Citations
14172
World Ranking
441
National Ranking
6

Computer Science

D-Index
63
Citations
14401
World Ranking
2779
National Ranking
20

Toshihide Ibaraki publication distribution in Mathematics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mathematics in 2026. The highlighted bar marks where Toshihide Ibaraki sits on this spectrum.

42–46 publications: 3 scientists 47–51 publications: 5 scientists 52–56 publications: 7 scientists 57–61 publications: 20 scientists 62–66 publications: 14 scientists 67–71 publications: 25 scientists 72–76 publications: 19 scientists 77–81 publications: 35 scientists 82–86 publications: 50 scientists 87–91 publications: 60 scientists 92–96 publications: 86 scientists 97–101 publications: 84 scientists 102–106 publications: 83 scientists 107–111 publications: 90 scientists 112–116 publications: 99 scientists 117–121 publications: 90 scientists 122–126 publications: 91 scientists 127–131 publications: 109 scientists 132–136 publications: 110 scientists 137–141 publications: 98 scientists 142–146 publications: 112 scientists 147–151 publications: 102 scientists 152–156 publications: 88 scientists 157–161 publications: 106 scientists 162–166 publications: 83 scientists 167–171 publications: 102 scientists 172–176 publications: 77 scientists 177–181 publications: 81 scientists 182–186 publications: 78 scientists 187–191 publications: 71 scientists 192–196 publications: 92 scientists 197–201 publications: 64 scientists 202–206 publications: 69 scientists 207–211 publications: 64 scientists 212–216 publications: 62 scientists 217–221 publications: 58 scientists 222–226 publications: 53 scientists 227–231 publications: 50 scientists 232–236 publications: 46 scientists 237–241 publications: 46 scientists 242–246 publications: 46 scientists 247–251 publications: 43 scientists 252–256 publications: 29 scientists 257–261 publications: 45 scientists 262–266 publications: 30 scientists 267–271 publications: 33 scientists 272–276 publications: 34 scientists 277–281 publications: 30 scientists 282–286 publications: 31 scientists 287–291 publications: 21 scientists 292–296 publications: 34 scientists 297–301 publications: 26 scientists 302–306 publications: 10 scientists 307–311 publications: 17 scientists 312–316 publications: 23 scientists 317–321 publications: 13 scientists 322–326 publications: 16 scientists 327–331 publications: 26 scientists 332–336 publications: 13 scientists 337–341 publications: 13 scientists 342–346 publications: 16 scientists 347–351 publications: 17 scientists 352–356 publications: 12 scientists 357–361 publications: 18 scientists 362–366 publications: 18 scientists 367–371 publications: 9 scientists 372–376 publications: 11 scientists 377–381 publications: 8 scientists 382–386 publications: 8 scientists 387–391 publications: 9 scientists 392–396 publications: 9 scientists 397–401 publications: 8 scientists 402–406 publications: 11 scientists 407–411 publications: 6 scientists 412–416 publications: 6 scientists 417–421 publications: 9 scientists 422–426 publications: 8 scientists 427–431 publications: 5 scientists 432–436 publications: 8 scientists 437–441 publications: 8 scientists 442–446 publications: 4 scientists 447–451 publications: 4 scientists 452–456 publications: 4 scientists 457–461 publications: 2 scientists 462–466 publications: 2 scientists 467–471 publications: 4 scientists 472–476 publications: 3 scientists 477–481 publications: 3 scientists 482–486 publications: 6 scientists 487–491 publications: 3 scientists 492–496 publications: 5 scientists 497–501 publications: 5 scientists 502–506 publications: 1 scientists 507–511 publications: 6 scientists 512–516 publications: 4 scientists 517–521 publications: 1 scientists 522–526 publications: 3 scientists 527–531 publications: 1 scientists 532–536 publications: 4 scientists 537+ publications: 100 scientists
42 publications 537+

This scientist: 368 publications — 92nd percentile

92% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 537 publications or more.

Toshihide Ibaraki D-index placement in Mathematics in 2026

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

30 D-Index: 174 scientists 31 D-Index: 151 scientists 32 D-Index: 174 scientists 33 D-Index: 117 scientists 34 D-Index: 136 scientists 35 D-Index: 127 scientists 36 D-Index: 145 scientists 37 D-Index: 153 scientists 38 D-Index: 150 scientists 39 D-Index: 150 scientists 40 D-Index: 138 scientists 41 D-Index: 136 scientists 42 D-Index: 93 scientists 43 D-Index: 108 scientists 44 D-Index: 115 scientists 45 D-Index: 112 scientists 46 D-Index: 103 scientists 47 D-Index: 75 scientists 48 D-Index: 59 scientists 49 D-Index: 67 scientists 50 D-Index: 60 scientists 51 D-Index: 57 scientists 52 D-Index: 59 scientists 53 D-Index: 62 scientists 54 D-Index: 60 scientists 55 D-Index: 50 scientists 56 D-Index: 42 scientists 57 D-Index: 54 scientists 58 D-Index: 50 scientists 59 D-Index: 42 scientists 60 D-Index: 41 scientists 61 D-Index: 35 scientists 62 D-Index: 40 scientists 63 D-Index: 21 scientists 64 D-Index: 31 scientists 65 D-Index: 27 scientists 66 D-Index: 29 scientists 67 D-Index: 19 scientists 68 D-Index: 25 scientists 69 D-Index: 17 scientists 70 D-Index: 18 scientists 71 D-Index: 12 scientists 72 D-Index: 14 scientists 73 D-Index: 13 scientists 74 D-Index: 18 scientists 75 D-Index: 9 scientists 76 D-Index: 11 scientists 77 D-Index: 10 scientists 78 D-Index: 9 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 10 scientists 82 D-Index: 5 scientists 83 D-Index: 5 scientists 84 D-Index: 13 scientists 85 D-Index: 6 scientists 86+ D-Index: 99 scientists
30 D-Index 86+

This scientist: 63 D-Index — 88th percentile

88% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 86 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Mathematics in Japan Leader Award
  • 2025 - Research.com Computer Science in Japan Leader Award
  • 2025 - Research.com Mathematics in Japan Leader Award
  • 2023 - Research.com Mathematics in Japan Leader Award
  • 2022 - Research.com Computer Science in Japan Leader Award
  • 1999 - ACM Fellow For contributions to the theory and algorithms of discrete optimization, graphs and networks, and logical analysis of data with Boolean functions, as well as their applications.

Overview

Toshihide Ibaraki is affiliated with Kwansei Gakuin University in Japan. Their work spans several areas within computer science, focusing on theoretical and algorithmic aspects.

In recognition of their scientific contributions, they were named an ACM Fellow in 1999. The award citation highlights contributions to the theory and algorithms of discrete optimization, graphs and networks, and logical analysis of data with Boolean functions, as well as their applications.

Best Publications

  • Resource Allocation Problems: Algorithmic Approaches

    Toshihide Ibaraki;Naoki Katoh

  • An implementation of logical analysis of data

    E. Boros;P.L. Hammer;T. Ibaraki;A. Kogan

  • Computing edge-connectivity in multigraphs and capacitated graphs

    Hiroshi Nagamochi;Toshihide Ibaraki

  • A linear-time algorithm for finding a sparse k -connected spanning subgraph of a k -connected graph

    Hiroshi Nagamochi;Toshihide Ibaraki

  • An efficient algorithm for K shortest simple paths

    Naoki Katoh;Toshihide Ibaraki;Hisashi Mine

  • Cause-effect relationships and partially defined Boolean functions

    Y. Crama;P. L. Hammer;T. Ibaraki

  • Logical analysis of numerical data

    Endre Boros;Peter L. Hammer;Toshihide Ibaraki;Alexander Kogan

  • On the optimal nesting order for computing N-relational joins

    Toshihide Ibaraki;Tiko Kameda

  • Formulation and Tabu Search Algorithm for the Resource Constrained Project Scheduling Problem

    Koji Nonobe;Toshihide Ibaraki

  • A globally convergent Newton method for solving strongly monotone variational inequalities

    Kouichi Taji;Masao Fukushima;Toshihide Ibaraki

  • Resource Allocation Problems

    Naoki Katoh;Toshihide Ibaraki

  • Effective Local Search Algorithms for Routing and Scheduling Problems with General Time-Window Constraints

    T. Ibaraki;S. Imahori;M. Kubo;T. Masuda

  • An Ejection Chain Approach for the Generalized Assignment Problem

    Mutsunori Yagiura;Toshihide Ibaraki;Fred Glover

  • Algorithmic Aspects of the Core of Combinatorial Optimization Games

    Xiaotie Deng;Toshihide Ibaraki;Hiroshi Nagamochi

  • An iterated local search algorithm for the time-dependent vehicle routing problem with time windows

    Hideki Hashimoto;Mutsunori Yagiura;Toshihide Ibaraki

  • Complexity of identification and dualization of positive Boolean functions

    Jan C. Bioch;Toshihide Ibaraki

  • A Solvable Case of the One-Machine Scheduling Problem with Ready and Due Times

    Hiroshi Kise;Toshihide Ibaraki;Hisashi Mine

  • A path relinking approach with ejection chains for the generalized assignment problem

    Mutsunori Yagiura;Toshihide Ibaraki;Fred W. Glover

  • One-dimensional cutting stock problem to minimize the number of different patterns

    Shunji Umetani;Mutsunori Yagiura;Toshihide Ibaraki

  • The vehicle routing problem with flexible time windows and traveling times

    Hideki Hashimoto;Toshihide Ibaraki;Shinji Imahori;Mutsunori Yagiura

  • Metaheuristics : progress as real problem solvers

    Toshihide Ibaraki;Koji Nonobe;Mutsunori Yagiura

  • THE MULTIPLE-CHOICE KNAPSACK PROBLEM

    Toshihide Ibaraki;Toshiharu Hasegawa;Katsumi Teranaka;Jiro Iwase

Frequent Co-Authors

Hiroshi Nagamochi
Hiroshi Nagamochi Kyoto University
Naoki Katoh
Naoki Katoh University of Hyogo
Masao Fukushima
Masao Fukushima Kyoto University
Endre Boros
Endre Boros Rutgers, The State University of New Jersey
Peter L. Hammer
Peter L. Hammer Rutgers, The State University of New Jersey
Alexander Kogan
Alexander Kogan Rutgers, The State University of New Jersey
Masafumi Yamashita
Masafumi Yamashita Kyushu University
Yves Crama
Yves Crama University of Liège
Xiaotie Deng
Xiaotie Deng Peking University

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