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Sei Otsuka

Sei Otsuka

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 43 17265 1362 174 6384

Sei Otsuka publications per year

The chart shows the history of publications by Sei Otsuka between 1958 and 2006, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Sei Otsuka published across 49 years, from 1958 to 2006, averaging 3.7 papers a year. Output peaked at 19 publications in 1972. 2 of the 179 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1958 to 2006. Vertical axis: number of publications, 0 to 19. Peak 19 publications in 1972. 1958: 2 publications 1959: 0 publications 1960: 0 publications 1961: 0 publications 1962: 0 publications 1963: 1 publication 1964: 0 publications 1965: 2 publications 1966: 3 publications 1967: 5 publications 1968: 5 publications 1969: 5 publications 1970: 3 publications 1971: 17 publications 1972: 19 publications 1973: 10 publications 1974: 14 publications 1975: 5 publications 1976: 14 publications 1977: 4 publications 1978: 11 publications 1979: 8 publications 1980: 7 publications 1981: 5 publications 1982: 11 publications 1983: 5 publications 1984: 2 publications 1985: 4 publications 1986: 2 publications 1987: 0 publications 1988: 0 publications 1989: 1 publication 1990: 2 publications 1991: 2 publications 1992: 0 publications 1993: 0 publications 1994: 0 publications 1995: 1 publication 1996: 1 publication 1997: 0 publications 1998: 2 publications 1999: 0 publications 2000: 0 publications 2001: 2 publications 2002: 0 publications 2003: 1 publication 2004: 1 publication 2005: 0 publications 2006: 2 publications
1958 2006

179 publications in total across all disciplines

View publications per year as a table
Sei Otsuka: publications per year, 1958 to 2006
Year Publications
1958 2
1959 0
1960 0
1961 0
1962 0
1963 1
1964 0
1965 2
1966 3
1967 5
1968 5
1969 5
1970 3
1971 17
1972 19
1973 10
1974 14
1975 5
1976 14
1977 4
1978 11
1979 8
1980 7
1981 5
1982 11
1983 5
1984 2
1985 4
1986 2
1987 0
1988 0
1989 1
1990 2
1991 2
1992 0
1993 0
1994 0
1995 1
1996 1
1997 0
1998 2
1999 0
2000 0
2001 2
2002 0
2003 1
2004 1
2005 0
2006 2
Total 179
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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.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 161–180 publications, is where this scientist sits. 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
61–80 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.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350 174
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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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.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 42–43 D-Index, is where this scientist sits. 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
40–41 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.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612 43
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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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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