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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Environmental Sciences 49 5316 5094 1 1 274 7867

Takaomi Arai publications per year

The chart shows the history of publications by Takaomi Arai between 1982 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Takaomi Arai published across 45 years, from 1982 to 2026, averaging 7.9 papers a year. Output peaked at 39 publications in 2022. 30 of the 356 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1982 to 2026. Vertical axis: number of publications, 0 to 39. Peak 39 publications in 2022. 1982: 1 publication 1983: 1 publication 1984: 0 publications 1985: 0 publications 1986: 0 publications 1987: 1 publication 1988: 0 publications 1989: 0 publications 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 0 publications 1996: 0 publications 1997: 1 publication 1998: 1 publication 1999: 4 publications 2000: 2 publications 2001: 8 publications 2002: 14 publications 2003: 21 publications 2004: 13 publications 2005: 13 publications 2006: 16 publications 2007: 10 publications 2008: 15 publications 2009: 11 publications 2010: 16 publications 2011: 5 publications 2012: 7 publications 2013: 4 publications 2014: 8 publications 2015: 11 publications 2016: 9 publications 2017: 7 publications 2018: 4 publications 2019: 9 publications 2020: 11 publications 2021: 4 publications 2022: 39 publications 2023: 30 publications 2024: 30 publications 2025: 29 publications 2026: 1 publication
1982 2026

356 publications in total across all disciplines

View publications per year as a table
Takaomi Arai: publications per year, 1982 to 2026
Year Publications
1982 1
1983 1
1984 0
1985 0
1986 0
1987 1
1988 0
1989 0
1990 0
1991 0
1992 0
1993 0
1994 0
1995 0
1996 0
1997 1
1998 1
1999 4
2000 2
2001 8
2002 14
2003 21
2004 13
2005 13
2006 16
2007 10
2008 15
2009 11
2010 16
2011 5
2012 7
2013 4
2014 8
2015 11
2016 9
2017 7
2018 4
2019 9
2020 11
2021 4
2022 39
2023 30
2024 30
2025 29
2026 1
Total 356
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Takaomi Arai publications per year - data summary

  • Takaomi Arai, a Environmental Sciences scholar from Universiti Brunei Darussalam, has 356 publications recorded across 45 years, from 1982 to 2026.
  • The oldest publication on record dates to 1982 and the most recent to 2026.
  • The most productive year is 2022, with 39 publications.
  • The least productive years with any output are 1982, 1983, 1987, 1997 and others, with 1 publication each.
  • 12 of the 45 years in the span carry no publications at all (1984, 1985, 1986, 1988 and others).
  • The rate of publication averages 7.9 papers per year over the whole span, or 10.8 per year counting only the 33 years with at least one publication.
  • The last 5 years on the chart (2022-2026) hold 129 publications, 36% of the career total.
  • Split into equal eras - 1982-1996: 3 publications (0.2 per year); 1997-2011: 150 publications (10.0 per year); 2012-2026: 203 publications (13.5 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Takaomi Arai publication distribution in Environmental Sciences in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Environmental Sciences in 2026. The highlighted bar marks where Takaomi Arai sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 66 bars. Horizontal axis: publications, 41–50 to 690+. Vertical axis: number of scientists, 0 to 617. Most scientists, 617, have 121–130 publications. The last bar groups every scientist with 690 publications or more. The highlighted bar, 271–280 publications, is where this scientist sits. 41–50 publications: 21 scientists 51–60 publications: 62 scientists 61–70 publications: 133 scientists 71–80 publications: 257 scientists 81–90 publications: 361 scientists 91–100 publications: 440 scientists 101–110 publications: 492 scientists 111–120 publications: 541 scientists 121–130 publications: 617 scientists 131–140 publications: 544 scientists 141–150 publications: 541 scientists 151–160 publications: 539 scientists 161–170 publications: 444 scientists 171–180 publications: 444 scientists 181–190 publications: 400 scientists 191–200 publications: 377 scientists 201–210 publications: 318 scientists 211–220 publications: 282 scientists 221–230 publications: 263 scientists 231–240 publications: 220 scientists 241–250 publications: 217 scientists 251–260 publications: 180 scientists 261–270 publications: 181 scientists 271–280 publications: 155 scientists 281–290 publications: 130 scientists 291–300 publications: 127 scientists 301–310 publications: 130 scientists 311–320 publications: 85 scientists 321–330 publications: 106 scientists 331–340 publications: 80 scientists 341–350 publications: 83 scientists 351–360 publications: 75 scientists 361–370 publications: 69 scientists 371–380 publications: 52 scientists 381–390 publications: 54 scientists 391–400 publications: 56 scientists 401–410 publications: 44 scientists 411–420 publications: 40 scientists 421–430 publications: 36 scientists 431–440 publications: 25 scientists 441–450 publications: 25 scientists 451–460 publications: 32 scientists 461–470 publications: 29 scientists 471–480 publications: 21 scientists 481–490 publications: 26 scientists 491–500 publications: 26 scientists 501–510 publications: 17 scientists 511–520 publications: 19 scientists 521–530 publications: 15 scientists 531–540 publications: 22 scientists 541–550 publications: 12 scientists 551–560 publications: 15 scientists 561–570 publications: 11 scientists 571–580 publications: 19 scientists 581–590 publications: 9 scientists 591–600 publications: 9 scientists 601–610 publications: 7 scientists 611–620 publications: 11 scientists 621–630 publications: 5 scientists 631–640 publications: 5 scientists 641–650 publications: 6 scientists 651–660 publications: 3 scientists 661–670 publications: 3 scientists 671–680 publications: 4 scientists 681–689 publications: 4 scientists 690+ publications: 100 scientists
41–50 publications 690+

This scientist: 274 publications — 82nd percentile

82% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 690 publications or more.

View publications distribution as a table
Number of Environmental Sciences scientists by publication count, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
Publications Scientists This scientist
41–50 21
51–60 62
61–70 133
71–80 257
81–90 361
91–100 440
101–110 492
111–120 541
121–130 617
131–140 544
141–150 541
151–160 539
161–170 444
171–180 444
181–190 400
191–200 377
201–210 318
211–220 282
221–230 263
231–240 220
241–250 217
251–260 180
261–270 181
271–280 155 274
281–290 130
291–300 127
301–310 130
311–320 85
321–330 106
331–340 80
341–350 83
351–360 75
361–370 69
371–380 52
381–390 54
391–400 56
401–410 44
411–420 40
421–430 36
431–440 25
441–450 25
451–460 32
461–470 29
471–480 21
481–490 26
491–500 26
501–510 17
511–520 19
521–530 15
531–540 22
541–550 12
551–560 15
561–570 11
571–580 19
581–590 9
591–600 9
601–610 7
611–620 11
621–630 5
631–640 5
641–650 6
651–660 3
661–670 3
671–680 4
681–689 4
690+ 100
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Takaomi Arai publication distribution in Environmental Sciences in 2026 - data summary

  • The chart plots the publication count of all 9,676 Environmental Sciences scientists ranked by Research.com in 2026, grouped into 66 ranges running from 41–50 to 690+ publications.
  • Takaomi Arai, a Environmental Sciences scholar from Universiti Brunei Darussalam, records 274 publications - the 82nd percentile of the discipline.
  • 82% of ranked Environmental Sciences scientists score the same or lower than Takaomi Arai, and about 18% score higher.
  • The median of the discipline falls in the 161–170 publications range, and Takaomi Arai ranks above the median.
  • The most crowded range is 121–130 publications, holding 617 scientists (6% of the field).
  • 67% of the field sits in the lowest quarter of the value range (up to 201–210 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 690 publications or more, 100 scientists in all (1% of the field).

Takaomi Arai D-index placement in Environmental Sciences in 2026

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

No. of scientists
100 200 300
Bar chart with 97 bars. Horizontal axis: D-Index, 30 to 126+. Vertical axis: number of scientists, 0 to 348. Most scientists, 348, have 45 D-Index. The last bar groups every scientist with 126 D-Index or more. The highlighted bar, 49 D-Index, is where this scientist sits. 30 D-Index: 12 scientists 31 D-Index: 26 scientists 32 D-Index: 51 scientists 33 D-Index: 88 scientists 34 D-Index: 123 scientists 35 D-Index: 163 scientists 36 D-Index: 206 scientists 37 D-Index: 267 scientists 38 D-Index: 265 scientists 39 D-Index: 275 scientists 40 D-Index: 321 scientists 41 D-Index: 343 scientists 42 D-Index: 305 scientists 43 D-Index: 336 scientists 44 D-Index: 330 scientists 45 D-Index: 348 scientists 46 D-Index: 291 scientists 47 D-Index: 275 scientists 48 D-Index: 272 scientists 49 D-Index: 273 scientists 50 D-Index: 263 scientists 51 D-Index: 232 scientists 52 D-Index: 266 scientists 53 D-Index: 217 scientists 54 D-Index: 198 scientists 55 D-Index: 177 scientists 56 D-Index: 202 scientists 57 D-Index: 204 scientists 58 D-Index: 166 scientists 59 D-Index: 177 scientists 60 D-Index: 166 scientists 61 D-Index: 152 scientists 62 D-Index: 143 scientists 63 D-Index: 150 scientists 64 D-Index: 124 scientists 65 D-Index: 119 scientists 66 D-Index: 120 scientists 67 D-Index: 118 scientists 68 D-Index: 82 scientists 69 D-Index: 98 scientists 70 D-Index: 94 scientists 71 D-Index: 105 scientists 72 D-Index: 74 scientists 73 D-Index: 84 scientists 74 D-Index: 70 scientists 75 D-Index: 67 scientists 76 D-Index: 78 scientists 77 D-Index: 60 scientists 78 D-Index: 59 scientists 79 D-Index: 52 scientists 80 D-Index: 47 scientists 81 D-Index: 38 scientists 82 D-Index: 48 scientists 83 D-Index: 42 scientists 84 D-Index: 42 scientists 85 D-Index: 43 scientists 86 D-Index: 29 scientists 87 D-Index: 37 scientists 88 D-Index: 29 scientists 89 D-Index: 30 scientists 90 D-Index: 34 scientists 91 D-Index: 20 scientists 92 D-Index: 22 scientists 93 D-Index: 17 scientists 94 D-Index: 19 scientists 95 D-Index: 24 scientists 96 D-Index: 21 scientists 97 D-Index: 20 scientists 98 D-Index: 24 scientists 99 D-Index: 17 scientists 100 D-Index: 17 scientists 101 D-Index: 21 scientists 102 D-Index: 25 scientists 103 D-Index: 18 scientists 104 D-Index: 26 scientists 105 D-Index: 20 scientists 106 D-Index: 15 scientists 107 D-Index: 10 scientists 108 D-Index: 13 scientists 109 D-Index: 15 scientists 110 D-Index: 12 scientists 111 D-Index: 8 scientists 112 D-Index: 7 scientists 113 D-Index: 9 scientists 114 D-Index: 6 scientists 115 D-Index: 12 scientists 116 D-Index: 7 scientists 117 D-Index: 8 scientists 118 D-Index: 3 scientists 119 D-Index: 5 scientists 120 D-Index: 7 scientists 121 D-Index: 2 scientists 122 D-Index: 4 scientists 123 D-Index: 8 scientists 124 D-Index: 7 scientists 125 D-Index: 9 scientists 126+ D-Index: 92 scientists
30 D-Index 126+

This scientist: 49 D-Index — 47th percentile

47% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 126 D-Index or more.

View D-Index distribution as a table
Number of Environmental Sciences scientists by D-index, Research.com 2026 ranking edition. Based on 9,676 ranked scientists.
D-Index Scientists This scientist
30 12
31 26
32 51
33 88
34 123
35 163
36 206
37 267
38 265
39 275
40 321
41 343
42 305
43 336
44 330
45 348
46 291
47 275
48 272
49 273 49
50 263
51 232
52 266
53 217
54 198
55 177
56 202
57 204
58 166
59 177
60 166
61 152
62 143
63 150
64 124
65 119
66 120
67 118
68 82
69 98
70 94
71 105
72 74
73 84
74 70
75 67
76 78
77 60
78 59
79 52
80 47
81 38
82 48
83 42
84 42
85 43
86 29
87 37
88 29
89 30
90 34
91 20
92 22
93 17
94 19
95 24
96 21
97 20
98 24
99 17
100 17
101 21
102 25
103 18
104 26
105 20
106 15
107 10
108 13
109 15
110 12
111 8
112 7
113 9
114 6
115 12
116 7
117 8
118 3
119 5
120 7
121 2
122 4
123 8
124 7
125 9
126+ 92
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Takaomi Arai D-index placement in Environmental Sciences in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 9,676 Environmental Sciences scientists ranked by Research.com in 2026, grouped into 97 ranges running from 30 to 126+ D-Index.
  • Takaomi Arai, a Environmental Sciences scholar from Universiti Brunei Darussalam, records 49 D-Index - the 47th percentile of the discipline.
  • 47% of ranked Environmental Sciences scientists score the same or lower than Takaomi Arai, and about 53% score higher.
  • The median of the discipline falls in the 51 D-Index range, and Takaomi Arai ranks below the median.
  • The most crowded range is 45 D-Index, holding 348 scientists (4% of the field).
  • 59% of the field sits in the lowest quarter of the value range (up to 54 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 126 D-Index or more, 92 scientists in all (<1% of the field).

Overview

Takaomi Arai is affiliated with Universiti Brunei Darussalam in Brunei Darussalam. Their research primarily spans Environmental Science and Agricultural and Biological Sciences, with 202 and 69 publications respectively. The work undertaken covers several subfields including Aquatic Science, Pollution, Health, Toxicology and Mutagenesis, Nature and Landscape Conservation, and Industrial and Manufacturing Engineering.

The scientist's research focuses on a range of main topics such as Fish Biology and Ecology Studies, Heavy metals in environment, Microplastics and Plastic Pollution, Recycling and Waste Management Techniques, Aquaculture Nutrition and Growth, Fish Ecology and Management Studies, and Reproductive biology and impacts on aquatic species.

Among their recent papers are:

  • Ecological and Human Health Risk Assessment of Heavy Metals in Cultured Shrimp and Aquaculture Sludge, 2022, Toxics
  • Ecology and evolution of migration in the freshwater eels of the genus Anguilla Schrank, 1798, 2020, Heliyon
  • Human health risk assessment for exposure to heavy metals in finfish and shellfish from a tropical estuary, 2022, Journal of King Saud University - Science
  • First Report on Microplastics Quantification in Poultry Chicken and Potential Human Health Risks in Pakistan, 2023, Toxics
  • Contamination status and associated ecological risk assessment of heavy metals in different wetland sediments from an urbanized estuarine ecosystem, 2022, Marine Pollution Bulletin

Takaomi Arai frequently collaborates with several researchers including:

  • M. Belal Hossain
  • Bilal Ahamad Paray
  • Mohammed Fahad Albeshr
  • As-Ad Ujjaman Nur
  • Qi Yu

The scientist publishes regularly in venues such as Marine Pollution Bulletin, Biology, Heliyon, Brazilian Journal of Biology, and Toxics, reflecting ongoing contributions to environmental and biological sciences with 9, 8, 8, 7, and 6 publications respectively in these journals.

Best Publications

  • Facultative catadromy of the eel, Anguilla japonica, between freshwater and seawater habitats

    Katsumi Tsukamoto;Takaomi Arai

  • Drastic changes in otolith microstructure and microchemistry accompanying the onset of metamorphosis in the Japanese eel Anguilla japonica

    Takaomi Arai;Tsuguo Otake;Katsumi Tsukamoto

  • Emissions and environmental implications of mercury from artisanal gold mining in North Sulawesi, Indonesia.

    Daniel Limbong;Jeims Kumampung;Joice Rimper;Takaomi Arai

  • Concentrations of antifouling biocides in sediment and mussel samples collected from Otsuchi bay, Japan.

    Hiroya Harino;Yoshikazu Yamamoto;Sayaka Eguchi;Shini’chiro Kawai

  • Recruitment mechanisms of tropical eels Anguilla spp. and implications for the evolution of oceanic migration in the genus Anguilla

    Takaomi Arai;Daniel Limbong;Tsuguo Otake;Katsumi Tsukamoto

  • Timing of metamorphosis and larval segregation of the Atlantic eels Anguilla rostrata and A. anguilla, as revealed by otolith microstructure and microchemistry

    T. Arai;T. Otake;K. Tsukamoto

  • Inshore migration of the tropical eels Anguilla spp. recruiting to the Poigar River estuary on north Sulawesi Island

    Hagi Yulia Sugeha;Takaomi Arai;Michael J. Miller;Daniel Limbong

  • Evidence of different habitat use by New Zealand freshwater eels Anguilla australis and A. dieffenbachii, as revealed by otolith microchemistry

    Takaomi Arai;Aya Kotake;P. Mark Lokman;Michael J. Miller

  • Metamorphosis and inshore migration of tropical eels Anguilla spp. in the Indo-Pacific

    Takaomi Arai;Daniel Limbong;Tsuguo Otake;Katsumi Tsukamoto

  • Ecotoxicology of Antifouling Biocides

    Takaomi Arai;Hiroya Harino;Madoka Ohji;William John Langston

  • Comparison of early life history between New Zealand temperate eels and Pacific tropical eels revealed by otolith microstructure and microchemistry

    Miho Marui;Takaomi Arai;Michael J. Miller;Donald J. Jellyman

  • Habitat use by the European eel Anguilla anguilla in Irish waters

    T. Arai;A. Kotake;T.K. McCarthy

  • Contrasting patterns of growth and migration of tropical anguillid leptocephali in the western Pacific and Indonesian Seas

    Mari Kuroki;Jun Aoyama;Michael J. Miller;Sam Wouthuyzen

  • Species composition and inshore migration of the tropical eels Anguilla spp. recruiting to the estuary of the Poigar River, Sulawesi Island

    Takaomi Arai;Jun Aoyama;Daniel Limbong;Katsumi Tsukamoto

  • Seasonal variation in the migratory history of the Japanese eel Anguilla japonica in Mikawa Bay, Japan

    Aya Kotake;Akihiro Okamura;Yoshiaki Yamada;Tomoko Utoh

  • Serological Evidence of Transmission of Human Influenza A and B Viruses to Caspian Seals (Phoca caspica)

    Kazue Ohishi;Ai Ninomiya;Hiroshi Kida;Chun-ho Park

  • Ecological and Human Health Risk Assessment of Heavy Metals in Cultured Shrimp and Aquaculture Sludge

    Unknown

  • An assessment of selected trace elements in intertidal surface sediments collected from the Peninsular Malaysia.

    Syaizwan Zahmir Zulkifli;Syaizwan Zahmir Zulkifli;Ferdaus Mohamat-Yusuff;Ferdaus Mohamat-Yusuff;Takaomi Arai;Ahmad Ismail

  • Concentrations of organotin compounds in sediment and clams collected from coastal areas in Vietnam.

    Sayaka Midorikawa;Takaomi Arai;Hiroya Harino;Madoka Ohji

  • Occurrence of sea eels of Anguilla japonica along the Sanriku Coast of Japan

    Takaomi Arai;Aya Kotake;Madoka Ohji;Michael J. Miller

  • Reconstructing habitat use of Coilia mystus and Coilia ectenes of the Yangtze River estuary, and of Coilia ectenes of Taihu Lake, based on otolith strontium and calcium

    J. Yang;J. Yang;T. Arai;H. Liu;N. Miyazaki

  • Variation in migratory history of Japanese eels, Anguilla japonica, collected in coastal waters of the Amakusa Islands, Japan, inferred from otolith Sr/Ca ratios

    A. Kotake;T. Arai;T. Ozawa;S. Nojima

Frequent Co-Authors

Nobuyuki Miyazaki
Nobuyuki Miyazaki University of Tokyo
Katsumi Tsukamoto
Katsumi Tsukamoto University of Tokyo
Michael J. Miller
Michael J. Miller University of Tokyo
Jun Aoyama
Jun Aoyama University of Tokyo
Takafumi Hirata
Takafumi Hirata University of Tokyo
Hiroshi Kida
Hiroshi Kida Hokkaido University
Yasuyuki Shibata
Yasuyuki Shibata Tokyo University of Marine Science and Technology
Yoshiyuki Iizuka
Yoshiyuki Iizuka Academia Sinica
Tadashi Maruyama
Tadashi Maruyama Kitasato University
Yuuki Y. Watanabe
Yuuki Y. Watanabe The Graduate University for Advanced Studies, SOKENDAI

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