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Koichi Hatada

Koichi Hatada

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Chemistry 60 9610 684 421 14568

Koichi Hatada publications per year

The chart shows the history of publications by Koichi Hatada between 1959 and 2014, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Koichi Hatada published across 56 years, from 1959 to 2014, averaging 7.6 papers a year. Output peaked at 26 publications in 1991. 1 of the 424 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1959 to 2014. Vertical axis: number of publications, 0 to 26. Peak 26 publications in 1991. 1959: 1 publication 1960: 0 publications 1961: 0 publications 1962: 1 publication 1963: 0 publications 1964: 1 publication 1965: 1 publication 1966: 2 publications 1967: 5 publications 1968: 5 publications 1969: 6 publications 1970: 10 publications 1971: 7 publications 1972: 3 publications 1973: 5 publications 1974: 5 publications 1975: 7 publications 1976: 5 publications 1977: 9 publications 1978: 8 publications 1979: 8 publications 1980: 9 publications 1981: 10 publications 1982: 7 publications 1983: 8 publications 1984: 11 publications 1985: 7 publications 1986: 15 publications 1987: 18 publications 1988: 14 publications 1989: 25 publications 1990: 19 publications 1991: 26 publications 1992: 23 publications 1993: 21 publications 1994: 17 publications 1995: 18 publications 1996: 18 publications 1997: 13 publications 1998: 8 publications 1999: 8 publications 2000: 10 publications 2001: 3 publications 2002: 10 publications 2003: 2 publications 2004: 9 publications 2005: 1 publication 2006: 0 publications 2007: 0 publications 2008: 1 publication 2009: 1 publication 2010: 2 publications 2011: 0 publications 2012: 0 publications 2013: 0 publications 2014: 1 publication
1959 2014

424 publications in total across all disciplines

View publications per year as a table
Koichi Hatada: publications per year, 1959 to 2014
Year Publications
1959 1
1960 0
1961 0
1962 1
1963 0
1964 1
1965 1
1966 2
1967 5
1968 5
1969 6
1970 10
1971 7
1972 3
1973 5
1974 5
1975 7
1976 5
1977 9
1978 8
1979 8
1980 9
1981 10
1982 7
1983 8
1984 11
1985 7
1986 15
1987 18
1988 14
1989 25
1990 19
1991 26
1992 23
1993 21
1994 17
1995 18
1996 18
1997 13
1998 8
1999 8
2000 10
2001 3
2002 10
2003 2
2004 9
2005 1
2006 0
2007 0
2008 1
2009 1
2010 2
2011 0
2012 0
2013 0
2014 1
Total 424
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Koichi Hatada publications per year - data summary

  • Koichi Hatada, a Chemistry scholar from Osaka University, has 424 publications recorded across 56 years, from 1959 to 2014.
  • The oldest publication on record dates to 1959 and the most recent to 2014.
  • The most productive year is 1991, with 26 publications.
  • The least productive years with any output are 1959, 1962, 1964, 1965 and others, with 1 publication each.
  • 8 of the 56 years in the span carry no publications at all (1960, 1961, 1963, 2006 and others).
  • The rate of publication averages 7.6 papers per year over the whole span, or 8.8 per year counting only the 48 years with at least one publication.
  • The last 5 years on the chart (2010-2014) hold 3 publications, <1% of the career total.
  • Split into equal eras - 1959-1977: 73 publications (3.8 per year); 1978-1996: 282 publications (14.8 per year); 1997-2014: 69 publications (3.8 per year).
  • Comparing the opening and closing eras, the overall trend of publication is broadly steady.

Koichi Hatada 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 Koichi Hatada 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, 421–440 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: 421 publications — 82nd percentile

82% 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
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
421–440 327 421
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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Koichi Hatada publication distribution in Chemistry in 2026 - data summary

  • The chart plots the publication count of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 63 ranges running from 61–80 to 1,295+ publications.
  • Koichi Hatada, a Chemistry scholar from Osaka University, records 421 publications - the 82nd percentile of the discipline.
  • 82% of ranked Chemistry scientists score the same or lower than Koichi Hatada, and about 18% score higher.
  • The median of the discipline falls in the 241–260 publications range, and Koichi Hatada ranks above the median.
  • The most crowded range is 161–180 publications, holding 1,350 scientists (8% of the field).
  • 77% of the field sits in the lowest quarter of the value range (up to 361–380 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 1,295 publications or more, 100 scientists in all (<1% of the field).

Koichi Hatada 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 Koichi Hatada 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, 60–61 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: 60 D-Index — 47th percentile

47% 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
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 60
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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Koichi Hatada D-index placement in Chemistry in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 17,934 Chemistry scientists ranked by Research.com in 2026, grouped into 61 ranges running from 40–41 to 159+ D-Index.
  • Koichi Hatada, a Chemistry scholar from Osaka University, records 60 D-Index - the 47th percentile of the discipline.
  • 47% of ranked Chemistry scientists score the same or lower than Koichi Hatada, and about 53% score higher.
  • The median of the discipline falls in the 62–63 D-Index range, and Koichi Hatada ranks below the median.
  • The most crowded range is 56–57 D-Index, holding 1,051 scientists (6% of the field).
  • 70% of the field sits in the lowest quarter of the value range (up to 70–71 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 159 D-Index or more, 98 scientists in all (<1% of the field).

Overview

Koichi Hatada is affiliated with Osaka University in Japan. Their academic profile currently includes a focus on research without publicly listed recent papers, frequent co-authors, or publication venues. Details on their contributions to specific fields and subfields of study, as well as topics of research, have not been disclosed.

There is no available data on published books or awards received by Koichi Hatada at this time.

This profile is based on the data provided, reflecting the current state of publicly available information on Koichi Hatada's academic and research activities.

Best Publications

  • Effects of weak linkages on the thermal and oxidative degradation of poly(methyl methacrylates)

    Takashi Kashiwagi;Atsushi Inaba;James E. Brown;Koichi Hatada

  • Optically active poly(triphenylmethyl methacrylate) with one-handed helical conformation

    Yoshio Okamoto;Koichi Suzuki;Koji Ohta;Koichi Hatada

  • Chromatographic resolution. 7. Useful chiral packing materials for high-performance liquid chromatographic resolution of enantiomers: phenylcarbamates of polysaccharides coated on silica gel

    Unknown

  • Stereoregular polymerization of α-substituted acrylates

    Koichi Hatada;Tatsuki Kitayama;Koichi Ute

  • Asymmetric polymerization of triphenylmethyl methacrylate leading to a one-handed helical polymer: mechanism of polymerization

    Tamaki Nakano;Yoshio Okamoto;Koichi Hatada

  • Living and Highly Isotactic Polymerization of Methyl Methacrylate by t-C4H9MgBr in Toluene

    Koichi Hatada;Koichi Ute;Katsuji Tanaka;Yoshio Okamoto

  • USEFUL CHIRAL PACKING MATERIALS FOR HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC RESOLUTION. CELLULOSE TRIACETATE AND TRIBENZOATE COATED ON MACROPOROUS SILICA GEL

    Yoshio Okamoto;Mitsunobu Kawashima;Koji Yamamoto;Koichi Hatada

  • Living and highly syndiotactic polymerization of methyl methacrylate and other methacrylates by tert‐butyllithiumtrialkylaluminium in toluene

    Tatsuki Kitayama;Tetsunori Shinozaki;Takashi Sakamoto;Masanori Yamamoto

  • Chiral Stationary Phases for HPLC: Cellulose Tris(3,5-dimethylphenylcarbamate) and Tris(3,5-dichlorophenylcarbamate) Chemically Bonded to Silica Gel∗

    Yoshio Okamoto;Ryo Aburatani;Shin-Ichi Miura;Koichi Hatada

  • Resolution of Enantiomers by HPLC on Optically Active Poly(triphenylmethyl Methacrylate)

    Yoshio Okamoto;Koichi Hatada

  • Preparation of Highly Isotactic Poly(methyl methacrylate) of Low Polydispersity

    Koichi Hatada;Koichi Ute;Katsuji Tanaka;Tatsuki Kitayama

  • Macromolecular design of polymeric materials

    Koichi Hatada;Tatsuki Kitayama;Otto Vogl

  • Optical resolution of dihydropyridine enantiomers by high-performance liquid chromatography using phenylcarbamates of polysaccharides as a chiral stationary phase

    Yoshio Okamoto;Ryo Aburatani;Koichi Hatada;Mikiko Honda

  • Optical Resolution of β-Blockers by HPLC on Cellulose Triphenylcarbamate Derivatives

    Yoshio Okamoto;Mitsunobu Kawashima;Ryo Aburatani;Koichi Hatada

  • Highly syndiotactic poly(methyl methacrylate) with narrow molecular weight distribution formed by tert-butyllithium-trialkylaluminium in toluene

    Tatsuki Kitayama;Tetsunori Shinozaki;Eiji Masuda;Masanori Yamamoto

  • Stereospecific Polymerization of Trityl, Diphenylmethyl and Benzyl Methacrylates

    Heimei Yuki;Koichi Hatada;Toshikazu Niinomi;Yukio Kikuchi

  • Haloaldehyde polymers. 51. Helix-sense reversal of isotactic chloral oligomers in solution

    Koichi Ute;Katsuo Hirose;Hiroaki Kashimoto;Koichi Hatada

  • CHROMATOGRAPHIC RESOLUTION. 7. USEFUL CHIRAL PACKING MATERIALS FOR HIGH‐PERFORMANCE LIQUID CHROMATOGRAPHIC RESOLUTION OF ENANTIOMERS: PHENYLCARBAMATES OF POLYSACCHARIDES COATED ON SILICA GEL

    Unknown

  • Stereospecific polymerization of alpha-substituted acrylic acid esters polymerization

    Heimei Yuki;Koichi Hatada

  • Glass transition temperature and melting temperature of uniform isotactic and syndiotactic poly(methyl methacrylate)s from 13mer to 50mer

    Unknown

  • Synthesis and properties of poly(ether ether ketone)-poly(ether sulfone) block copolymers

    Junkui Cao;Wencheng Su;Zhongwen Wu;Tatsuki Kitayama

  • The fundamentals of applying electrospray ionization mass spectrometry to low mass poly(methyl methacrylate) polymers.

    Charles N. McEwen;William J. Simonsick;Barbara S. Larsen;Kaichi Ute

  • NMR Measurement of Identical Polymer Samples by Round Robin Method I. Reliability of Chemical Shift and Signal Intensity Measurements

    Riichiro Chûjô;Koichi Hatada;Ryozo Kitamaru;Tatsuki Kitayama

Frequent Co-Authors

Tatsuki Kitayama
Tatsuki Kitayama Osaka University
Yoshio Okamoto
Yoshio Okamoto Nagoya University
Eiji Yashima
Eiji Yashima Nagoya University
Mikiharu Kamachi
Mikiharu Kamachi Osaka University
Koji Ohta
Koji Ohta National Institute of Advanced Industrial Science and Technology
Robert W. Lenz
Robert W. Lenz University of Massachusetts Amherst
Masamichi Kobayashi
Masamichi Kobayashi Osaka University
Hirotaka Ihara
Hirotaka Ihara Kumamoto University
Shiro Kobayashi
Shiro Kobayashi Kyoto University
Andrew K. Whittaker
Andrew K. Whittaker University of Queensland

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