World's Best Scientists 2026 revealed!
Izumi Washitani

Izumi Washitani

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Ecology and Evolution
Japan
2023

D-Index & Metrics

Ecology and Evolution

D-Index
44
Citations
7332
World Ranking
5079
National Ranking
21

Izumi Washitani publication distribution in Ecology and Evolution in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Ecology and Evolution in 2026. The highlighted bar marks where Izumi Washitani sits on this spectrum.

37–41 publications: 2 scientists 42–46 publications: 9 scientists 47–51 publications: 10 scientists 52–56 publications: 31 scientists 57–61 publications: 56 scientists 62–66 publications: 91 scientists 67–71 publications: 92 scientists 72–76 publications: 127 scientists 77–81 publications: 173 scientists 82–86 publications: 236 scientists 87–91 publications: 227 scientists 92–96 publications: 240 scientists 97–101 publications: 333 scientists 102–106 publications: 280 scientists 107–111 publications: 300 scientists 112–116 publications: 285 scientists 117–121 publications: 305 scientists 122–126 publications: 287 scientists 127–131 publications: 278 scientists 132–136 publications: 289 scientists 137–141 publications: 273 scientists 142–146 publications: 262 scientists 147–151 publications: 246 scientists 152–156 publications: 235 scientists 157–161 publications: 205 scientists 162–166 publications: 199 scientists 167–171 publications: 174 scientists 172–176 publications: 164 scientists 177–181 publications: 173 scientists 182–186 publications: 189 scientists 187–191 publications: 170 scientists 192–196 publications: 139 scientists 197–201 publications: 128 scientists 202–206 publications: 117 scientists 207–211 publications: 115 scientists 212–216 publications: 107 scientists 217–221 publications: 124 scientists 222–226 publications: 81 scientists 227–231 publications: 82 scientists 232–236 publications: 85 scientists 237–241 publications: 75 scientists 242–246 publications: 66 scientists 247–251 publications: 81 scientists 252–256 publications: 69 scientists 257–261 publications: 70 scientists 262–266 publications: 55 scientists 267–271 publications: 64 scientists 272–276 publications: 49 scientists 277–281 publications: 48 scientists 282–286 publications: 44 scientists 287–291 publications: 45 scientists 292–296 publications: 36 scientists 297–301 publications: 39 scientists 302–306 publications: 38 scientists 307–311 publications: 30 scientists 312–316 publications: 34 scientists 317–321 publications: 25 scientists 322–326 publications: 22 scientists 327–331 publications: 28 scientists 332–336 publications: 30 scientists 337–341 publications: 22 scientists 342–346 publications: 30 scientists 347–351 publications: 26 scientists 352–356 publications: 22 scientists 357–361 publications: 29 scientists 362–366 publications: 21 scientists 367–371 publications: 12 scientists 372–376 publications: 18 scientists 377–381 publications: 17 scientists 382–386 publications: 13 scientists 387–391 publications: 21 scientists 392–396 publications: 13 scientists 397–401 publications: 10 scientists 402–406 publications: 15 scientists 407–411 publications: 8 scientists 412–416 publications: 9 scientists 417–421 publications: 8 scientists 422–426 publications: 4 scientists 427–431 publications: 10 scientists 432–436 publications: 10 scientists 437–441 publications: 5 scientists 442–446 publications: 4 scientists 447–451 publications: 10 scientists 452–456 publications: 2 scientists 457–461 publications: 4 scientists 462–466 publications: 7 scientists 467–471 publications: 7 scientists 472–476 publications: 6 scientists 477–481 publications: 6 scientists 482–486 publications: 3 scientists 487–491 publications: 3 scientists 492–496 publications: 4 scientists 497–501 publications: 4 scientists 502–506 publications: 8 scientists 507–511 publications: 5 scientists 512–516 publications: 4 scientists 517–521 publications: 5 scientists 522–526 publications: 4 scientists 527–530 publications: 5 scientists 531+ publications: 100 scientists
37 publications 531+

This scientist: 226 publications — 81st percentile

81% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 531 publications or more.

Izumi Washitani D-index placement in Ecology and Evolution in 2026

The chart shows the D-index (discipline H-index) distribution of Ecology and Evolution scientists ranked by Research.com in 2026. The highlighted bar marks where Izumi Washitani sits on this spectrum.

30 D-Index: 95 scientists 31 D-Index: 123 scientists 32 D-Index: 191 scientists 33 D-Index: 245 scientists 34 D-Index: 252 scientists 35 D-Index: 244 scientists 36 D-Index: 249 scientists 37 D-Index: 244 scientists 38 D-Index: 254 scientists 39 D-Index: 254 scientists 40 D-Index: 280 scientists 41 D-Index: 274 scientists 42 D-Index: 266 scientists 43 D-Index: 233 scientists 44 D-Index: 248 scientists 45 D-Index: 208 scientists 46 D-Index: 201 scientists 47 D-Index: 213 scientists 48 D-Index: 207 scientists 49 D-Index: 172 scientists 50 D-Index: 209 scientists 51 D-Index: 199 scientists 52 D-Index: 153 scientists 53 D-Index: 169 scientists 54 D-Index: 163 scientists 55 D-Index: 148 scientists 56 D-Index: 120 scientists 57 D-Index: 146 scientists 58 D-Index: 137 scientists 59 D-Index: 140 scientists 60 D-Index: 104 scientists 61 D-Index: 119 scientists 62 D-Index: 118 scientists 63 D-Index: 99 scientists 64 D-Index: 77 scientists 65 D-Index: 100 scientists 66 D-Index: 86 scientists 67 D-Index: 83 scientists 68 D-Index: 75 scientists 69 D-Index: 94 scientists 70 D-Index: 57 scientists 71 D-Index: 68 scientists 72 D-Index: 59 scientists 73 D-Index: 63 scientists 74 D-Index: 66 scientists 75 D-Index: 60 scientists 76 D-Index: 42 scientists 77 D-Index: 49 scientists 78 D-Index: 39 scientists 79 D-Index: 37 scientists 80 D-Index: 43 scientists 81 D-Index: 41 scientists 82 D-Index: 45 scientists 83 D-Index: 34 scientists 84 D-Index: 40 scientists 85 D-Index: 35 scientists 86 D-Index: 55 scientists 87 D-Index: 24 scientists 88 D-Index: 24 scientists 89 D-Index: 30 scientists 90 D-Index: 23 scientists 91 D-Index: 25 scientists 92 D-Index: 27 scientists 93 D-Index: 27 scientists 94 D-Index: 13 scientists 95 D-Index: 23 scientists 96 D-Index: 12 scientists 97 D-Index: 14 scientists 98 D-Index: 19 scientists 99 D-Index: 16 scientists 100 D-Index: 14 scientists 101 D-Index: 5 scientists 102 D-Index: 21 scientists 103 D-Index: 16 scientists 104 D-Index: 10 scientists 105 D-Index: 7 scientists 106 D-Index: 7 scientists 107 D-Index: 7 scientists 108 D-Index: 6 scientists 109 D-Index: 9 scientists 110 D-Index: 11 scientists 111 D-Index: 12 scientists 112 D-Index: 9 scientists 113 D-Index: 7 scientists 114 D-Index: 3 scientists 115 D-Index: 8 scientists 116 D-Index: 5 scientists 117 D-Index: 11 scientists 118 D-Index: 4 scientists 119 D-Index: 2 scientists 120 D-Index: 5 scientists 121+ D-Index: 100 scientists
30 D-Index 121+

This scientist: 44 D-Index — 41st percentile

41% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 121 D-Index or more.

Research.com Recognitions

  • 2023 - Research.com Ecology and Evolution in Japan Leader Award
  • 2022 - Research.com Ecology and Evolution in Japan Leader Award

Overview

Izumi Washitani is affiliated with Chuo University in Japan and has contributed to research primarily in the fields of Environmental Science, Biochemistry, Genetics and Molecular Biology, and Agricultural and Biological Sciences. Their work spans multiple subfields, including Ecology, Evolution, Behavior and Systematics; Global and Planetary Change; Developmental Biology; Ecology; and Nature and Landscape Conservation.

The main topics covered by Washitani's research include plant and animal studies, animal vocal communication and behavior, fish ecology and management studies, reproductive biology and impacts on aquatic species, marine and fisheries research, species distribution and climate change, and animal and plant science education.

Among their recent publications, the following papers represent Washitani's research contributions:

  • Testing a butterfly commonness hypothesis with data assembled by a citizen science program "Tokyo Butterfly Monitoring", 2020, Ecological Research
  • Management of glass eel fisheries is not a sufficient measure to recover a local Japanese eel population, 2021, Marine Policy (lead author Kenzo Kaifu)
  • A Preliminary Report on Vespa analis eisa (Hymenoptera: Vespidae) as a Potential Natural Enemy of Apis cerana japonica (Hymenoptera: Apidae) on Amami Island, 2021, Entomological News
  • Intraspecific variation in advertisement call characteristics and acoustic strategies among male forest green tree frogs, 2023, Population Ecology
  • Passive acoustic monitoring for assessing forest bird distribution and identifying conservationally important areas in a subtropical forest landscape, 2025, Ecological Research (lead author Tohki Inoue)

The scientist has frequently collaborated with notable coauthors, including Kenzo Kaifu, Kazuki Yokouchi, Michael J. Miller, Mihoko Nagai, and Masaki Yasukawa.

Washitani's publications are often found in specialized venues such as Ecological Research, Marine Policy, Entomological News, and Population Ecology. The mix of journals reflects the interdisciplinary nature of their research interests, encompassing ecology, conservation biology, and marine sciences.

Best Publications

  • Citizen science: a new approach to advance ecology, education, and conservation

    Hiromi Kobori;Janis L. Dickinson;Izumi Washitani;Ryo Sakurai

  • Contrasting impacts of invasive engineers on freshwater ecosystems: an experiment and meta-analysis.

    Shin-ichiro S. Matsuzaki;Shin-ichiro S. Matsuzaki;Nisikawa Usio;Noriko Takamura;Izumi Washitani

  • Displacement of Japanese native bumblebees by the recently introduced Bombus terrestris (L.) (Hymenoptera: Apidae)

    Maki N. Inoue;Jun Yokoyama;Izumi Washitani

  • A Comparative Study of the Germination Characteristics of Seeds from a Moist Tall Grassland Community

    I. Washitani;M. Masuda

  • Contributions of diffusional limitation, photoinhibition and photorespiration to midday depression of photosynthesis in Arisaema heterophyllum in natural high light

    Hiroyuki Muraoka;Yanhong Tang;Ichiro Terashima;Hiroshi Koizumi

  • Effects of common carp on nutrient dynamics and littoral community composition: roles of excretion and bioturbation

    Shin-ichiro S. Matsuzaki;Nisikawa Usio;Noriko Takamura;Izumi Washitani

  • Invasion Status and Potential Ecological Impacts of an Invasive Alien Bumblebee, Bombus terrestris L. (Hymenoptera: Apidae) Naturalized in Southern Hokkaido, Japan

    Chizuru Matsumura;Jun Yokoyama;Izumi Washitani

  • PATTERNS OF FEMALE FERTILITY IN HETEROSTYLOUS PRIMULA-SIEBOLDII UNDER SEVERE POLLINATOR LIMITATION

    I. Washitani

  • Dragonfly species richness on man-made ponds: effects of pond size and pond age on newly established assemblages

    Taku Kadoya;Shin-ichi Suda;Izumi Washitani

  • GENETIC DIVERSITY AND OUTCROSSING RATE BETWEEN UNDISTURBED AND SELECTIVELY LOGGED FORESTS OF SHOREA CURTISII (DIPTEROCARPACEAE) USING MICROSATELLITE DNA ANALYSIS

    Kyoko Obayashi;Yoshihiko Tsumura;Tokuko Ihara-Ujino;Kaoru Niiyama

  • The Satoyama Index: A biodiversity indicator for agricultural landscapes

    Taku Kadoya;Izumi Washitani

  • Traditional sustainable ecosystem 'SATOYAMA' and biodiversity crisis in Japan : conservation ecological perspective

    I. Washitani

  • Fluctuation of photosynthetic photon flux density within a Miscanthus sinensis canopy

    Yan-Hong Tang;Izumi Washitani;Takayoshi Tsuchiya;Hideo Iwaki

  • Effects of population size and pollinator limitation on seed-set of Primula sieboldii populations in a fragmented landscape

    Chizuru Matsumura;Izumi Washitani

  • Using monitoring data gathered by volunteers to predict the potential distribution of the invasive alien bumblebee Bombus terrestris

    Taku Kadoya;Hiroshi S. Ishii;Reina Kikuchi;Shin-ichi Suda

  • Dragonfly crisis in Japan: a likely consequence of recent agricultural habitat degradation.

    Taku Kadoya;Shin-ichi Suda;Izumi Washitani

  • A convenient screening test system and a model for thermal germination responses of wild plant seeds : Behaviour of model and real seeds in the system

    I. Washitani

  • Plant conservation ecology for management and restoration of riparian habitats of lowland Japan

    Izumi Washitani

  • Patterns and consequences of stigma height variation in a natural population of a distylous plant, Primula sieboldii

    J. Nishihiro;I. Washitani;J. D. Thomson;J. D. Thomson;B. A. Thomson

  • Predicted genetic consequences of strong fertility selection due to pollinator loss in an isolated population of Primula sieboldii

    Izumi Washitani

  • Regeneration failure of lakeshore plants under an artificially altered water regime

    Jun Nishihiro;Shigenari Miyawaki;Nobuo Fujiwara;Izumi Washitani

Frequent Co-Authors

Yoshihiko Tsumura
Yoshihiko Tsumura University of Tsukuba
Yanhong Tang
Yanhong Tang Peking University
Hiroyuki Muraoka
Hiroyuki Muraoka Gifu University
Haihua Shen
Haihua Shen Chinese Academy of Sciences
Kenji Omasa
Kenji Omasa University of Tokyo
Hiroshi Koizumi
Hiroshi Koizumi Waseda University
Katsumi Tsukamoto
Katsumi Tsukamoto University of Tokyo
Michael J. Miller
Michael J. Miller University of Tokyo
Jun Aoyama
Jun Aoyama University of Tokyo
Noriko Takamura
Noriko Takamura National Institute for Environmental Studies

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Related Online Degrees & Career Pathways

Studying Ecology and Evolution opens the door to a variety of interdisciplinary career options. Many students complement their environmental focus with online degrees in related fields to enhance their career prospects. For example, the creative side of habitat restoration and environmental communication may benefit from explorations in online graphic design courses. These skills can help professionals craft compelling visual materials for conservation projects.

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Additionally, as ecological challenges intersect with urban design and sustainability, an online architecture degree can prepare students to contribute to eco-friendly building projects and green infrastructure.

Finally, students seeking versatility may consider degrees with flexible curricula. Programs with lower tuition, like online interdisciplinary studies tuition costs, offer a cost-effective way to integrate diverse fields and tailor a unique career path in ecology and evolution.

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