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Akihiro Yokoyama

Akihiro Yokoyama

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 42 17406 15741 1373 1243 127 8467

Akihiro Yokoyama publications per year

The chart shows the history of publications by Akihiro Yokoyama between 1985 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Akihiro Yokoyama published across 41 years, from 1985 to 2025, averaging 3.8 papers a year. Output peaked at 11 publications in 2005. 12 of the 155 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1985 to 2025. Vertical axis: number of publications, 0 to 11. Peak 11 publications in 2005. 1985: 1 publication 1986: 0 publications 1987: 2 publications 1988: 2 publications 1989: 0 publications 1990: 0 publications 1991: 1 publication 1992: 1 publication 1993: 1 publication 1994: 4 publications 1995: 6 publications 1996: 6 publications 1997: 3 publications 1998: 3 publications 1999: 2 publications 2000: 4 publications 2001: 1 publication 2002: 2 publications 2003: 7 publications 2004: 9 publications 2005: 11 publications 2006: 4 publications 2007: 7 publications 2008: 8 publications 2009: 7 publications 2010: 5 publications 2011: 10 publications 2012: 8 publications 2013: 4 publications 2014: 5 publications 2015: 4 publications 2016: 0 publications 2017: 2 publications 2018: 2 publications 2019: 1 publication 2020: 1 publication 2021: 1 publication 2022: 6 publications 2023: 2 publications 2024: 8 publications 2025: 4 publications
1985 2025

155 publications in total across all disciplines

View publications per year as a table
Akihiro Yokoyama: publications per year, 1985 to 2025
Year Publications
1985 1
1986 0
1987 2
1988 2
1989 0
1990 0
1991 1
1992 1
1993 1
1994 4
1995 6
1996 6
1997 3
1998 3
1999 2
2000 4
2001 1
2002 2
2003 7
2004 9
2005 11
2006 4
2007 7
2008 8
2009 7
2010 5
2011 10
2012 8
2013 4
2014 5
2015 4
2016 0
2017 2
2018 2
2019 1
2020 1
2021 1
2022 6
2023 2
2024 8
2025 4
Total 155
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Akihiro Yokoyama 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 Akihiro Yokoyama 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, 121–140 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: 127 publications — 7th percentile

7% 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
121–140 918 127
141–160 1,218
161–180 1,350
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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Akihiro Yokoyama 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 Akihiro Yokoyama 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: 42 D-Index — 3rd percentile

3% 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 42
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

Akihiro Yokoyama is affiliated with Seikei University in Japan, contributing to research primarily in the field of Medicine with a focus on Organic Chemistry, Materials Chemistry, Molecular Biology, Hematology, and Epidemiology. Their scholarly output reflects an interdisciplinary approach combining chemical synthesis and medical studies.

The main topics addressed in Yokoyama's work include:

  • Multiple Myeloma Research and Treatments
  • Protein Degradation and Inhibitors
  • Peptidase Inhibition and Analysis
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Lymphoma Diagnosis and Treatment
  • Chemical Synthesis and Analysis

Yokoyama has published research in several well-known venues, with frequent publications appearing in:

  • Cureus
  • The Cambridge Structural Database
  • International Journal of Hematology
  • In Vivo
  • Journal of Anesthesia

Recent notable papers by Yokoyama include:

  • Synthesis of a coronene analogue containing an amide bond by Pd-mediated intramolecular C C bond formation of 2-halogenated 4-(alkylamino)benzoic acid cyclic trimer, 2020, Tetrahedron Letters
  • Primary analysis of a prospective cohort study of Japanese patients with plasma cell neoplasms in the novel drug era (2016-2021), 2024, International Journal of Hematology
  • Development of Helical Aromatic Amide Foldamers with a Diphenylacetylene Backbone, 2020, The Journal of Organic Chemistry
  • Five-year follow-up of a phase II study of DA-EPOCH-R with high-dose MTX in CD5-positive DLBCL, 2023, Cancer Science
  • High-dose dexamethasone therapy as the initial treatment for idiopathic thrombocytopenic purpura, 2020, International Journal of Hematology

Yokoyama frequently collaborates with researchers including Isao Azumaya, Kenta Rakumitsu, Tetsuya Hara, Shoko Kikkawa, and Hironori Ueno. These partnerships have been important in producing multidisciplinary studies spanning chemistry and hematology.

Best Publications

  • Chain-Growth Polymerization for Poly(3-hexylthiophene) with a Defined Molecular Weight and a Low Polydispersity

    Akihiro Yokoyama;T. Ryo Miyakoshi;Tsutomu Yokozawa

  • Catalyst-transfer polycondensation. mechanism of Ni-catalyzed chain-growth polymerization leading to well-defined poly(3-hexylthiophene).

    Ryo Miyakoshi;and Akihiro Yokoyama;Tsutomu Yokozawa

  • Chain-Growth Condensation Polymerization for the Synthesis of Well-Defined Condensation Polymers and π-Conjugated Polymers

    Tsutomu Yokozawa;Akihiro Yokoyama

  • Chain-Growth Polymerization for the Synthesis of Polyfluorene via Suzuki−Miyaura Coupling Reaction from an Externally Added Initiator Unit

    Akihiro Yokoyama;Hirofumi Suzuki;Yasuhiro Kubota;Kazuei Ohuchi

  • Structure of maitotoxin

    Michio Murata;Hideo Naoki;Takashi Iwashita;Shigeki Matsunaga

  • Catalyst-transfer polycondensation for the synthesis of poly(p-phenylene) with controlled molecular weight and low polydispersity.

    Ryo Miyakoshi;Kyohei Shimono;and Akihiro Yokoyama;Tsutomu Yokozawa

  • Synthesis of Poly(3‐hexylthiophene) with a Narrower Polydispersity

    Ryo Miyakoshi;Ryo Miyakoshi;Akihiro Yokoyama;Tsutomu Yokozawa;Tsutomu Yokozawa

  • Converting step-growth to chain-growth condensation polymerization

    Akihiro Yokoyama;Tsutomu Yokozawa

  • Precision Synthesis of Poly(N-hexylpyrrole) and Its Diblock Copolymer with Poly(p-phenylene) via Catalyst-Transfer Polycondensation

    Akihiro Yokoyama;Akira Kato;Ryo Miyakoshi;Tsutomu Yokozawa

  • Catalyst-Transfer Suzuki―Miyaura Coupling Polymerization for Precision Synthesis of Poly(p-phenylene)

    Tsutomu Yokozawa;Haruhiko Kohno;Yoshihiro Ohta;Akihiro Yokoyama

  • Some chemical properties of maitotoxin, a putative calcium channel agonist isolated from a marine dinoflagellate.

    Akihiro Yokoyama;Michio Murata;Yasukatsu Oshima;Takashi Iwashita

  • Precision synthesis of poly(3-hexylthiophene) from catalyst-transfer Suzuki-Miyaura coupling polymerization.

    Tsutomu Yokozawa;Ryosuke Suzuki;Masataka Nojima;Yoshihiro Ohta

  • Styloguanidines, new chitinase inhibitors from the marine sponge Stylotella aurantium

    Taketoshi Kato;Yoshikazu Shizuri;Hitoshi Izumida;Akihiro Yokoyama

  • Helical Structures of N-Alkylated Poly(p-benzamide)s

    Aya Tanatani;Akihiro Yokoyama;Isao Azumaya;Yoshinori Takakura

  • Prototype Pictet−Spengler Reactions Catalyzed by Superacids. Involvement of Dicationic Superelectrophiles

    Akihiro Yokoyama;Tomohiko Ohwada;Koichi Shudo

  • Chain-growth polycondensation: The living polymerization process in polycondensation

    Tsutomu Yokozawa;Akihiro Yokoyama

  • Importance of the Order of Successive Catalyst-transfer Condensation Polymerization in the Synthesis of Block Copolymers of Polythiophene and Poly(p-phenylene)

    Ryo Miyakoshi;Akihiro Yokoyama;Tsutomu Yokozawa

  • Catalyst-Transfer Condensation Polymerization for the Synthesis of Well-Defined Polythiophene with Hydrophilic Side Chain and of Diblock Copolythiophene with Hydrophilic and Hydrophobic Side Chains

    Tsutomu Yokozawa;Isao Adachi;Ryo Miyakoshi;Akihiro Yokoyama

  • Chain-growth polycondensation for well-defined aramide. Synthesis of unprecedented block copolymer containing aramide with low polydispersity.

    Tsutomu Yokozawa;Miyuki Ogawa;Atsushi Sekino;Ryuji Sugi

  • Production of Astaxanthin and 4-Ketozeaxanthin by the Marine Bacterium,<i>Agrobacterium aurantiacum</i>

    Unknown

  • Development of catalyst‐transfer condensation polymerization. Synthesis of π‐conjugated polymers with controlled molecular weight and low polydispersity

    Ryo Miyakoshi;Akihiro Yokoyama;Tsutomu Yokozawa

Frequent Co-Authors

Tsutomu Yokozawa
Tsutomu Yokozawa Kanagawa University
Norihiko Misawa
Norihiko Misawa Ishikawa Prefectural University
Masanobu Uchiyama
Masanobu Uchiyama University of Tokyo
Michio Murata
Michio Murata Osaka University
Chih-Feng Huang
Chih-Feng Huang National Chung Hsing University
Takeshi Yasumoto
Takeshi Yasumoto Tohoku University
Gerhard Sandmann
Gerhard Sandmann Goethe University Frankfurt
Hideo Naoki
Hideo Naoki Tohoku University
Jun Miyake
Jun Miyake Osaka University
Keisuke Kurita
Keisuke Kurita Seikei University

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