World's Best Scientists 2026 revealed!
Sei Otsuka

Sei Otsuka

D-Index & Metrics

Chemistry

D-Index
43
Citations
6384
World Ranking
17265
National Ranking
1362

Sei Otsuka 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 Sei Otsuka 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: 174 publications — 23rd percentile

23% of scientists in this discipline score the same or lower.

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

Sei Otsuka 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 Sei Otsuka 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: 43 D-Index — 5th percentile

5% of scientists in this discipline score the same or lower.

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

Overview

Sei Otsuka is affiliated with Osaka University in Japan. Their academic profile indicates active engagement in research associated with this institution.

There are no records of recent papers, co-authors, or specific publication venues linked to Sei Otsuka at this time.

No information is available regarding book publications or awards received by Sei Otsuka.

Similarly, there are no listed main fields of study, subfields of study, or primary topics associated with their research output.

Sei Otsuka remains an active researcher, with current data primarily reflecting their institutional association rather than detailed bibliometric or topical contributions.

Best Publications

  • Metal-assisted terpenoid synthesis. 7. Highly enantioselective isomerization of prochiral allylamines catalyzed by chiral diphosphine rhodium(I) complexes. Preparation of optically active enamines

    Kazuhide Tani;Tsuneaki Yamagata;Susumu Akutagawa;Hidenori Kumobayashi

  • A highly enantioselective synthesis of cyclopropane derivatives through chiral cobalt(II) complex catalyzed carbenoid reaction. General scope and factors determining the enantioselectivity

    Akira Nakamura;Akira Konishi;Yoshitaka Tatsuno;Sei Otsuka

  • Chemistry of alkoxycarbonyl, acyl, and alkyl compounds of nickel(II) and palladium(II)

    Sei. Otsuka;Akira. Nakamura;Toshikatsu. Yoshida;Masanobu. Naruto

  • Chiral metal complexes. 4. Resolution of racemic tertiary phosphines with chiral palladium(II) complexes. The chemistry of diastereomeric phosphine palladium(II) species in solution

    K. Tani;Leo D. Brown;Jamil Ahmed;James A. Ibers

  • Acetylene and Allene Complexes: Their Implication in Homogeneous Catalysis

    Sei Otsuka;Akira Nakamura

  • Mechanism of the asymmetric isomerization of allylamines to enamines catalyzed by 2,2'-bis(diphenylphosphino)-1,1'binaphthyl-rhodium complexes

    Shinichi Inoue;Hidemasa Takaya;Kazuhide Tani;Sei Otsuka

  • Oxygen complexes of nickel and palladium. Formation, structure, and reactivities

    Seinosuke Otsuka;Akira Nakamura;Yoshitaka Tatsuno

  • Enantioselective carbenoid cyclopropanation catalyzed by chiral vic-dioximatocobalt(II) complexes prepared from natural camphor and .beta.-pinene. Mechanism and stereochemistry

    Akira Nakamura;Akira Konishi;Ryoichi Tsujitani;Masaaki Kudo

  • .pi.-Coordination of unsaturated bonds containing heteroatoms. II. Iron carbonyl complexes of azomethine analogs of 1,3-dienes. Preparation and nature of the coordination bondings

    Seinosuke Otsuka;T. Yoshida;Akira Nakamura

  • Reactions of two-coordinate phosphine platinum(0) and palladium(0) compounds. Ligand exchange and reactivities toward small molecules

    Unknown

  • Partial resolution of racemic tertiary phosphines with an asymmetric palladium complex

    Seinosuke Otsuka;Akira Nakamura;Tosizi Kano;Kazuhide Tani

  • Cyclopropanation reactions of diazoalkanes with substituted olefins in the presence and absence of nickel(0) and palladium(0) catalysts. The structure of (diazofluorene)bis(tert-butyl isocyanide)nickel(0); a complex containing a .pi.-bonded diazofluorene molecule

    Akira Nakamura;Toshikatsu Yoshida;Martin Cowie;Sei Otsuka

  • Chemistry of platinum and palladium compounds of bulky phosphines

    Sei Otsuka

  • Catalytic Asymmetric Hydrogen Migration of Allylamines

    Sei Otsuka;Kazuhide Tani

  • Cationic rhodium(I) complex-catalysed asymmetric isomerisation of allylamines to optically active enamines

    Kazuhide Tani;Tsuneaki Yamagata;Sei Otsuka;Susumu Akutagawa

  • Cis dihydride diphosphine complexes of platium(II) and their dehydrogenation to form dimeric platinum(0) complexes. The structure of [Pt(tert-Bu)2P(CH2)3P(tert-Bu)2]2

    T. Yoshida;T. Yamagata;T. H. Tulip;James A. Ibers

  • Activation of water molecule. 2. Generation of strong hydroxo bases by the reaction of water with platinum(0) phosphine complexes and the applications as catalysts for hydrogen-deuterium exchange and hydration reactions

    Unknown

  • .sigma.-Alkyl or .sigma.-acyl isocyanide complexes of nickel(II) and palladium(II). Preparation and successive insertion reactions

    Seinosuke Otsuka;Akira Nakamura;Toshikatsu Yoshida

  • (η <sup>3</sup> ‐Allyl)Palladium(II) Complexes

    Unknown

  • CHIRAL METAL COMPLEXES. PART 5. COBALT(II) AND SOME OTHER TRANSITION METAL COMPLEXES OF CHIRAL VIC-DIOXIMATE LIGANDS DERIVED FROM D-CAMPHOR AND L-β-PINENE

    A. Nakamura;A. Konishi;S. Otsuka

  • Chiral metal complexes. Part 5. Cobalt(II) and some other transition-metal complexes of chiral vic-dioximate ligands derived from D-camphor and L-β-pinene

    Akira Nakamura;Akira Konishi;Sei Otsuka

  • Metal-assisted terpenoid syntheses. 6. Enantioselective hydrogen migration in prochiral allylamine systems by chiral cobalt catalysts

    Hidenori Kumobayashi;Susumu Akutagawa;Sei Otsuka

  • Bis[(R)-(+)-binap]rhodium(I) Perchlorate, a Highly Efficient Catalyst for the Asymmetric Isomerization of Allylamines†

    Kazuhide Tani;Tsuneaki Yamagata;Yoshitaka Tatsuno;Yuriko Yamagata

  • Aromatic nitroso compounds as .pi. acids in the zerovalent nickel triad metal complexes and the metal-assisted atom-transfer reactions with donor reagents

    Sei. Otsuka;Yoshimasa. Aotani;Yoshitaka. Tatsuno;Toshikatsu. Yoshida

  • Catalytic hydrogenation of nitriles and dehydrogenation of amines with the rhodium(<scp>I</scp>) hydrido compounds [RhH(PPr<sup>i</sup><sub>3</sub>)<sub>3</sub>] and [Rh<sub>2</sub>H<sub>2</sub>(µ-N<sub>2</sub>){P(cyclohexyl)<sub>3</sub>}<sub>4</sub>]

    Unknown

  • Reaction of transition metal dihydrides. III. Stereochemistry and mechanism of stoichiometric hydrogenation of olefins by dihydrobis (.pi.-cyclopentadienyl) molybdenum

    Akira. Nakamura;Sei. Otsuka

Frequent Co-Authors

Akira Nakamura
Akira Nakamura Osaka University
Ken Hirotsu
Ken Hirotsu Osaka Metropolitan University
Hidemasa Takaya
Hidemasa Takaya Kyoto University
Ryoji Noyori
Ryoji Noyori Nagoya University
Yuriko Yamagata
Yuriko Yamagata Kumamoto University
Hiroyuki Tadokoro
Hiroyuki Tadokoro Osaka University
Roald Hoffmann
Roald Hoffmann Cornell University
Teizo Kitagawa
Teizo Kitagawa University of Hyogo
Teruo Okano
Teruo Okano Tokyo Women's Medical University

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