World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
79
Citations
21645
World Ranking
3624
National Ranking
205

Kunio Arai publication distribution in Chemistry in 2026

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

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 307 publications — 65th percentile

65% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Kunio Arai D-index placement in Chemistry in 2026

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

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 79 D-Index — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Overview

Kunio Arai is a researcher affiliated with Tohoku University in Japan, with a focus on Medicine and Neuroscience. Their work includes studies in specialized subfields such as Physiology, Endocrine and Autonomic Systems, and Neurology.

The scientist's main research topics involve diet and metabolism studies, the neuroscience of respiration and sleep, as well as issues related to alcoholism and thiamine deficiency.

Arai has contributed to publications in the Journal of Trace Elements in Medicine and Biology.

  • Randomized, multicenter, active-controlled open-label study of NPC-25, zinc histidine hydrate, (non-inferiority to NOBELZIN™, zinc acetate dihydrate) for patients with hypozincemia, 2024, Journal of Trace Elements in Medicine and Biology

Collaborators frequently working with Arai include Daisuke Asaoka, Tomomi Ishihara, Sachiko Ezoe, Izumi Hamada, and Motohiro Kitamura.

Best Publications

  • Dissolution and Hydrolysis of Cellulose in Subcritical and Supercritical Water

    Mitsuru Sasaki;Zhen Fang;Yoshiko Fukushima;Tadafumi Adschiri

  • Cellulose hydrolysis in subcritical and supercritical water

    Mitsuru Sasaki;Bernard Kabyemela;Roberto Malaluan;Satoshi Hirose

  • Glucose and fructose decomposition in subcritical and supercritical water: Detailed reaction pathway, mechanisms, and kinetics

    Bernard M. Kabyemela;Tadafumi Adschiri;Roberto M. Malaluan;Kunio Arai

  • Rapid and Continuous Hydrothermal Crystallization of Metal Oxide Particles in Supercritical Water

    Tadafumi Adschiri;Katsuhito Kanazawa;Kunio Arai

  • Hydrothermal Synthesis of Metal Oxide Fine Particles at Supercritical Conditions

    Tadafumi Adschiri;Yukiya Hakuta;Kunio Arai

  • Kinetics of glucose epimerization and decomposition in subcritical and supercritical water

    Bernard M. Kabyemela;Tadafumi Adschiri;Roberto M. Malaluan;Kunio Arai

  • Reaction chemistry and phase behavior of lignin in high-temperature and supercritical water

    Zhen Fang;Takafumi Sato;Richard L. Smith;Hiroshi Inomata

  • Conversion of Lignin with Supercritical Water−Phenol Mixtures

    Motofumi Saisu;Takafumi Sato;Masaru Watanabe;Tadafumi Adschiri

  • Hydrothermal Synthesis of Metal Oxide Nanoparticles at Supercritical Conditions

    Tadafumi Adschiri;Yukiya Hakuta;Kiwamu Sue;Kunio Arai

  • Chemical Reactions of C1 Compounds in Near-Critical and Supercritical Water

    Masaru Watanabe;Takafumi Sato;Hiroshi Inomata;Richard Lee Smith

  • Dehydration Of D-glucose in high temperature water at pressures up to 80 MPa

    Taku Michael Aida;Yukiko Sato;Masaru Watanabe;Kiyohiko Tajima

  • Kinetics of cellulose conversion at 25 MPa in sub‐ and supercritical water

    Mitsuru Sasaki;Tadafumi Adschiri;Kunio Arai

  • Isothermal vapor-liquid equilibrium data for binary systems at high pressures: carbon dioxide-methanol, carbon dioxide-ethanol, carbon dioxide-1-propanol, methane-ethanol, methane-1-propanol, ethane-ethanol, and ethane-1-propanol systems

    Kazuhiko Suzuki;Haruhusa Sue;Masahiro Itou;Richard Lee Jr. Smith

  • Catalytic hydrogen generation from biomass (glucose and cellulose) with ZrO2 in supercritical water

    Masaru Watanabe;Hiroshi Inomata;Kunio Arai

  • Low-Temperature Catalytic Gasification of Lignin and Cellulose with a Ruthenium Catalyst in Supercritical Water

    Mitsumasa Osada;Takafumi Sato;Masaru Watanabe;Tadafumi Adschiri

  • Rapid and Continuous Hydrothermal Synthesis of Boehmite Particles in Subcritical and Supercritical Water

    Tadafumi Adschiri;Katsuhito Kanazawa;Kunio Arai

  • Catalytic effects of NaOH and ZrO2 for partial oxidative gasification of n-hexadecane and lignin in supercritical water

    Masaru Watanabe;Hiroshi Inomata;Mitsumasa Osada;Takafumi Sato

  • Noncatalytic Conversion of Cellulose in Supercritical and Subcritical Water

    Tadafumi Adschiri;Satoru Hirose;Roberto Malaluan;Kunio Arai

  • Mechanism and Kinetics of Cellobiose Decomposition in Sub- and Supercritical Water

    B. M. Kabyemela;M. Takigawa;Tadafumi Adschiri;R. M. Malaluan

  • Fine particle formation using supercritical fluids

    Yukiya Hakuta;Hiromichi Hayashi;Kunio Arai

Frequent Co-Authors

Tadafumi Adschiri
Tadafumi Adschiri Tohoku University
Hiroshi Inomata
Hiroshi Inomata Tohoku University
Richard L. Smith
Richard L. Smith Tohoku University
Masaru Watanabe
Masaru Watanabe Tohoku University
Mitsuru Sasaki
Mitsuru Sasaki Kumamoto University
Hitoshi Kasai
Hitoshi Kasai Tohoku University
Zhen Fang
Zhen Fang Nanjing Agricultural University
Yutaka Ikushima
Yutaka Ikushima National Institute of Advanced Industrial Science and Technology
Kiyoshi Kanamura
Kiyoshi Kanamura Tokyo Metropolitan University
Koji Takahashi
Koji Takahashi Kyushu University

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