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Ryoshi Ishiwatari

D-Index & Metrics

Discipline name D-Index World Ranking National Ranking Publications Citations
Earth Science 42 5169 134 158 8170

Ryoshi Ishiwatari publications per year

The chart shows the history of publications by Ryoshi Ishiwatari between 1961 and 2014, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ryoshi Ishiwatari published across 54 years, from 1961 to 2014, averaging 3.1 papers a year. Output peaked at 12 publications in 1999. 2 of the 169 publications appeared in the last two years.

No. of publications
5 10
Bar chart. Horizontal axis: year, 1961 to 2014. Vertical axis: number of publications, 0 to 12. Peak 12 publications in 1999. 1961: 2 publications 1962: 0 publications 1963: 1 publication 1964: 0 publications 1965: 0 publications 1966: 2 publications 1967: 1 publication 1968: 1 publication 1969: 1 publication 1970: 1 publication 1971: 1 publication 1972: 0 publications 1973: 3 publications 1974: 1 publication 1975: 1 publication 1976: 1 publication 1977: 5 publications 1978: 5 publications 1979: 1 publication 1980: 5 publications 1981: 4 publications 1982: 3 publications 1983: 7 publications 1984: 3 publications 1985: 7 publications 1986: 6 publications 1987: 8 publications 1988: 2 publications 1989: 3 publications 1990: 3 publications 1991: 5 publications 1992: 8 publications 1993: 6 publications 1994: 4 publications 1995: 9 publications 1996: 3 publications 1997: 5 publications 1998: 2 publications 1999: 12 publications 2000: 10 publications 2001: 5 publications 2002: 7 publications 2003: 2 publications 2004: 1 publication 2005: 4 publications 2006: 1 publication 2007: 1 publication 2008: 0 publications 2009: 2 publications 2010: 0 publications 2011: 1 publication 2012: 1 publication 2013: 1 publication 2014: 1 publication
1961 2014

169 publications in total across all disciplines

View publications per year as a table
Ryoshi Ishiwatari: publications per year, 1961 to 2014
Year Publications
1961 2
1962 0
1963 1
1964 0
1965 0
1966 2
1967 1
1968 1
1969 1
1970 1
1971 1
1972 0
1973 3
1974 1
1975 1
1976 1
1977 5
1978 5
1979 1
1980 5
1981 4
1982 3
1983 7
1984 3
1985 7
1986 6
1987 8
1988 2
1989 3
1990 3
1991 5
1992 8
1993 6
1994 4
1995 9
1996 3
1997 5
1998 2
1999 12
2000 10
2001 5
2002 7
2003 2
2004 1
2005 4
2006 1
2007 1
2008 0
2009 2
2010 0
2011 1
2012 1
2013 1
2014 1
Total 169
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Ryoshi Ishiwatari publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Ryoshi Ishiwatari sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 158–167 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 158 publications — 43rd percentile

43% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484
118–127 540
128–137 557
138–147 491
148–157 495
158–167 458 158
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Ryoshi Ishiwatari D-index placement in Earth Science in 2026

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

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 42 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 42 D-Index — 44th percentile

44% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344
39 349
40 296
41 289
42 277 42
43 279
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

Ryoshi Ishiwatari is affiliated with Tokyo Metropolitan University in Japan. Their academic profile is focused on research activities conducted within this institution.

There are no recent papers, co-authors, publication venues, book publications, fields of study, subfields, main research topics, or awards listed in the available data for Ryoshi Ishiwatari.

Given the available information, the profile centers mainly on their institutional association without further details on research output or specific scientific contributions.

Best Publications

  • Lacustrine organic geochemistry—an overview of indicators of organic matter sources and diagenesis in lake sediments

    Philip A. Meyers;Ryoshi Ishiwatari

  • Organic Matter Accumulation Records in Lake Sediments

    P. A. Meyers;R. Ishiwatari

  • Biodegradation experiments of linear alkylbenzenes (LABs): isomeric composition of C12 LABs as an indicator of the degree of LAB degradation in the aquatic environment.

    Hideshige Takada;Ryoshi Ishiwatari

  • Linear alkylbenzenes in urban riverine environments in Tokyo: distribution, source, and behavior

    Hideshige. Takada;Ryoshi. Ishiwatari

  • Latest Paleocene benthic foraminiferal extinction and environmental changes at Tawanui, New Zealand

    Kunio Kaiho;Tetsuya Arinobu;Ryoshi Ishiwatari;Hugh E. G. Morgans

  • The Early Diagenesis of Organic Matter in Lacustrine Sediments

    Philip A. Meyers;Ryoshi Ishiwatari

  • Source identification of Malaysian atmospheric polycyclic aromatic hydrocarbons nearby forest fires using molecular and isotopic compositions

    Tomoaki Okuda;Hidetoshi Kumata;Mohamad Pauzi Zakaria;Hiroshi Naraoka

  • Diagenetic changes of lignin compounds in a more than 0.6 million-year-old lacustrine sediment (Lake Biwa, Japan)

    Ryoshi Ishiwatari;Minoru Uzaki

  • Molecular-isotopic stratigraphy of long-chain n-alkanes in Lake Baikal Holocene and glacial age sediments

    David Brincat;Keita Yamada;Ryoshi Ishiwatari;Hitoshi Uemura

  • Thermal alteration experiments on organic matter from recent marine sediments in relation to petroleum genesis

    R Ishiwatari;M Ishiwatari;B.G Rohrback;I.R Kaplan

  • Spike of pyrosynthetic polycyclic aromatic hydrocarbons associated with an abrupt decrease in δ13C of a terrestrial biomarker at the Cretaceous-Tertiary boundary at Caravaca, Spain

    Tetsuya Arinobu;Ryoshi Ishiwatari;Kunio Kaiho;Marcos A. Lamolda

  • Organic geochemistry of a lacustrine sediment (Lake Haruna, Japan)

    Ryoshi Ishiwatari;Kazuko Ogura;Shoji Horie

  • Alkylbenzene pollution of Tokyo Bay sediments

    Ryoshi Ishiwatari;Hideshige Takada;Sun-Ja Yun;Eiji Matsumoto

  • Macromolecular material (humic substance) in the water column and sediments

    Ryoshi Ishiwatari

  • Early diagenesis of organic matter in the water column and sediments: Microbial degradation and resynthesis of lipids in Lake Haruna

    Kimitaka Kawamura;Ryoshi Ishiwatari;Kazuko Ogura

  • Generation of unsaturated and aromatic hydrocarbons by thermal alteration of young kerogen

    Ryoshi Ishiwatari;Kazuo Fukushima

  • Alkenone-sea surface temperatures in the Japan Sea over the past 36 kyr: warm temperatures at the last glacial maximum

    R Ishiwatari;M Houtatsu;H Okada

  • Oceanic primary productivity and dissolved oxygen levels at the Cretaceous/Tertiary boundary: Their decrease, subsequent warming, and recovery

    Kunio Kaiho;Yoshimichi Kajiwara;Kazue Tazaki;Masato Ueshima

  • Molecular and isotopic abundances of long-chain n-fatty acids in open marine sediments of the western North Pacific

    Hiroshi Naraoka;Ryoshi Ishiwatari

  • Upward decrease of organic C/N ratios in the Okinawa Trough cores: proxy for tracing the post-glacial retreat of the continental shore line

    Hiroshi Ujiié;Yasuhide Hatakeyama;Xue Xin Gu;Shuichi Yamamoto

Frequent Co-Authors

Kimitaka Kawamura
Kimitaka Kawamura Chubu University
Hiroshi Naraoka
Hiroshi Naraoka Kyushu University
Kunio Kaiho
Kunio Kaiho Tohoku University
Hideshige Takada
Hideshige Takada Tokyo University of Agriculture and Technology
Takashi Tatsumi
Takashi Tatsumi Tokyo Institute of Technology
Hodaka Kawahata
Hodaka Kawahata University of Tokyo
Philip A. Meyers
Philip A. Meyers University of Michigan–Ann Arbor
J.W. de Leeuw
J.W. de Leeuw Delft University of Technology
Bernd R.T. Simoneit
Bernd R.T. Simoneit Oregon State University
Naohiko Ohkouchi
Naohiko Ohkouchi Japan Agency for Marine-Earth Science and Technology

External Links

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Additionally, careers in information management, especially concerning environmental data, can benefit greatly from ala mlis programs, which prepare students for leadership in library and information sciences.

Best Scientists Citing Ryoshi Ishiwatari

Philip A. Meyers

Philip A. Meyers

University of Michigan–Ann Arbor

Publications: 53

Kimitaka Kawamura

Kimitaka Kawamura

Chubu University

Publications: 43

Melanie J. Leng

Melanie J. Leng

University of Nottingham

Publications: 38

Mohamad Pauzi Zakaria

Mohamad Pauzi Zakaria

University of Malaya

Publications: 33

Sylvie Derenne

Sylvie Derenne

Université Paris Cité

Publications: 31

Bernd R.T. Simoneit

Bernd R.T. Simoneit

Oregon State University

Publications: 31

Ellen Thomas

Ellen Thomas

Yale University

Publications: 29

Claude Largeau

Claude Largeau

Centre national de la recherche scientifique, CNRS

Publications: 27

Jaap S. Sinninghe Damsté

Jaap S. Sinninghe Damsté

Royal Netherlands Institute for Sea Research

Publications: 27

Hideshige Takada

Hideshige Takada

Tokyo University of Agriculture and Technology

Publications: 26

Geoffrey Eglinton

Geoffrey Eglinton

University of Bristol

Publications: 25

Stefan Schouten

Stefan Schouten

Utrecht University

Publications: 25

Shucheng Xie

Shucheng Xie

China University of Geosciences

Publications: 24

Richard D. Pancost

Richard D. Pancost

University of Bristol

Publications: 20

Yongsong Huang

Yongsong Huang

Brown University

Publications: 20

Masao Uchida

Masao Uchida

National Institute for Environmental Studies

Publications: 19

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