Ryoshi Ishiwatari

6.9k citations

139 papers · 5.4k indexed · 1 hit paper · h-index 36

Impact in

Atmospheric Science top 1%
- Geology and Paleoclimatology Research
Environmental Chemistry top 0.5%
- Methane Hydrates and Related Phenomena

Papers in ⓘ

Analytical Chemistry 30
- Petroleum Processing and Analysis 28
Mechanics of Materials 66
- Hydrocarbon exploration and reservoir analysis 65

Co-authors: Philip A. Meyers (1 shared paper)Hideshige Takada (9 shared papers)Kimitaka Kawamura (15 shared papers)Hiroshi Naraoka (17 shared papers)Mariko Ishiwatari (11 shared papers)Keita Yamada (17 shared papers)Shuichi Yamamoto (16 shared papers)Haru Sakashita (6 shared papers)
Journals: Organic Geochemistry (29 papers)Geochimica et Cosmochimica Acta (9 papers)Chemical Geology (8 papers)Journal of Analytical and Applied Pyrolysis (6 papers)Proceedings of the Japan Academy Series B (5 papers)
Partner nations: Japan United States Israel

In The Last Decade

Ryoshi Ishiwatari

137 papers receiving 5.1k citations

Hit Papers

align trajectories log scale

Lacustrine organic geochemistry—an overview of indicators of organic matter sources and diagenesis in lake sediments 1993 · 1.5k citations

Peers

Countries citing papers authored by Ryoshi Ishiwatari

Since Specialization

Citations

This map shows the geographic impact of Ryoshi Ishiwatari's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ryoshi Ishiwatari with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryoshi Ishiwatari more than expected).

Fields of papers citing papers by Ryoshi Ishiwatari

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryoshi Ishiwatari. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ryoshi Ishiwatari. The network helps show where Ryoshi Ishiwatari may publish in the future.

Co-authors

The 25 scholars most cited alongside Ryoshi Ishiwatari, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Ryoshi Ishiwatari Line = papers co-authored together Ryoshi Ishiwatari links everyone, so they are left out of the graph.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Showing the 20 most-cited of 139 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Lacustrine organic geochemistry—an overview of indicators of organic matter sources and diagenesis in lake sediments Organic Geochemistry ·Philip A. Meyers, Ryoshi Ishiwatari Hit paper breakdown →	1993	1526
2	J. Anal. Appl. Pyrolysis Journal of Analytical and Applied Pyrolysis ·Mariko Ishiwatari, Ryoshi Ishiwatari, Haru Sakashita, Takahide Tatsumi, H. Tominaga	1995	344
3	Biodegradation experiments of linear alkylbenzenes (LABs): isomeric composition of C12 LABs as an indicator of the degree of LAB degradation in the aquatic environment Environmental Science & Technology ·Hideshige Takada, Ryoshi Ishiwatari	1990	131
4	Linear alkylbenzenes in urban riverine environments in Tokyo: distribution, source, and behavior Environmental Science & Technology ·Hideshige Takada, Ryoshi Ishiwatari	1987	126
5	Latest Paleocene benthic foraminiferal extinction and environmental changes at Tawanui, New Zealand Paleoceanography ·Kunio Kaiho, Tetsuya Arinobu, Ryoshi Ishiwatari, Hugh E. G. Morgans, Hisatake Okada, Nobuyori Takeda, Kazue Tazaki, Gouping Zhou, Yoshimichi Kajiwara, Ryo Matsumoto, Akio Hirai, Nobuaki Niitsuma, Hideki Wada	1996	122
6	Source identification of Malaysian atmospheric polycyclic aromatic hydrocarbons nearby forest fires using molecular and isotopic compositions Atmospheric Environment ·Tomoaki Okuda, Hidetoshi Kumata, Mohamad Pauzi Zakaria, Hiroshi Naraoka, Ryoshi Ishiwatari, Hideshige Takada	2002	110
7	Thermal alteration experiments on organic matter from recent marine sediments in relation to petroleum genesis Geochimica et Cosmochimica Acta ·Ryoshi Ishiwatari, Mariko Ishiwatari, Brian G. Rohrback, I. R. Kaplan	1977	102
8	Molecular-isotopic stratigraphy of long-chain n-alkanes in Lake Baikal Holocene and glacial age sediments Organic Geochemistry ·David Brincat, Keita Yamada, Ryoshi Ishiwatari, Hitoshi Uemura, Hiroshi Naraoka	2000	102
9	Diagenetic changes of lignin compounds in a more than 0.6 million-year-old lacustrine sediment (Lake Biwa, Japan) Geochimica et Cosmochimica Acta ·Ryoshi Ishiwatari, Minoru Uzaki	1987	94
10	Organic geochemistry of a lacustrine sediment (Lake Haruna, Japan) Chemical Geology ·Ryoshi Ishiwatari, Kazuko Ogura, Shoji HORIE	1980	89
11	Alkylbenzene pollution of Tokyo Bay sediments Nature ·Ryoshi Ishiwatari, Hideshige Takada, Sun-Ja Yun, Eiji Matsumoto	1983	86
12	Alkenone-sea surface temperatures in the Japan Sea over the past 36 kyr: warm temperatures at the last glacial maximum Organic Geochemistry ·Ryoshi Ishiwatari, M Houtatsu, H. Okada	2001	80
13	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 Geology ·Tetsuya Arinobu, Ryoshi Ishiwatari, Kunio Kaiho, Marcos A. Lamolda	1999	80
14	Early diagenesis of organic matter in the water column and sediments: Microbial degradation and resynthesis of lipids in Lake Haruna Organic Geochemistry ·Kimitaka Kawamura, Ryoshi Ishiwatari, Kazuko Ogura	1987	79
15	Generation of unsaturated and aromatic hydrocarbons by thermal alteration of young kerogen Geochimica et Cosmochimica Acta ·Ryoshi Ishiwatari, Kazuo Fukushima	1979	75
16	Macromolecular material (humic substance) in the water column and sediments Marine Chemistry ·Ryoshi Ishiwatari	1992	73
17	Distribution of linear alkylbenzenes (LABs) and linear alkylbenzenesulphonates (LAS) in Tokyo Bay sediments Estuarine Coastal and Shelf Science ·Hideshige Takada, Ryoshi Ishiwatari, Norio Ogura	1992	70
18	Oceanic primary productivity and dissolved oxygen levels at the Cretaceous/Tertiary Boundary: Their decrease, subsequent warming, and recovery Paleoceanography ·Kunio Kaiho, Yoshimichi Kajiwara, Kazue Tazaki, Masato Ueshima, Nobuyori Takeda, Hodaka Kawahata, Tetsuya Arinobu, Ryoshi Ishiwatari, Akio Hirai, Marcos A. Lamolda	1999	63
19	Molecular and isotopic abundances of long-chain n-fatty acids in open marine sediments of the western North Pacific Chemical Geology ·Hiroshi Naraoka, Ryoshi Ishiwatari	2000	62
20	Upward decrease of organic C/N ratios in the Okinawa Trough cores: proxy for tracing the post-glacial retreat of the continental shore line Palaeogeography Palaeoclimatology Palaeoecology ·Hiroshi Ujiié, Yasuhide Hatakeyama, Xue Xin Gu, Shuichi Yamamoto, Ryoshi Ishiwatari, Lena Maeda	2001	59

About Ryoshi Ishiwatari

Ryoshi Ishiwatari is a scholar working on Analytical Chemistry, Mechanics of Materials, Oceanography, Atmospheric Science and Environmental Chemistry, having authored 139 papers that have together received 5.4k indexed citations. Recurring topics across this work include Hydrocarbon exploration and reservoir analysis (65 papers), Isotope Analysis in Ecology (50 papers), Geology and Paleoclimatology Research (39 papers), Petroleum Processing and Analysis (28 papers), Marine and coastal ecosystems (19 papers), Methane Hydrates and Related Phenomena (17 papers), Atmospheric and Environmental Gas Dynamics (16 papers) and Geochemistry and Geologic Mapping (14 papers). The work is most often cited by research in Atmospheric Science (2.1k citations), Environmental Chemistry (1.2k citations), Oceanography (974 citations), Geochemistry and Petrology (421 citations) and Paleontology (492 citations). Ryoshi Ishiwatari has collaborated with scholars based in Japan, United States and Israel. Frequent co-authors include Philip A. Meyers, Hideshige Takada, Kimitaka Kawamura, Hiroshi Naraoka, Mariko Ishiwatari, Keita Yamada, Shuichi Yamamoto, Haru Sakashita, Kazuo Fukushima and H. Tominaga. Their work appears in journals such as Organic Geochemistry, Geochimica et Cosmochimica Acta, Chemical Geology, Journal of Analytical and Applied Pyrolysis and Proceedings of the Japan Academy Series B.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact