Koichi Iijima

2.3k total citations
50 papers, 1.3k citations indexed

About

Koichi Iijima is a scholar working on Atmospheric Science, Environmental Chemistry and Geochemistry and Petrology. According to data from OpenAlex, Koichi Iijima has authored 50 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Atmospheric Science, 18 papers in Environmental Chemistry and 14 papers in Geochemistry and Petrology. Recurrent topics in Koichi Iijima's work include Geology and Paleoclimatology Research (23 papers), Methane Hydrates and Related Phenomena (18 papers) and Geochemistry and Elemental Analysis (14 papers). Koichi Iijima is often cited by papers focused on Geology and Paleoclimatology Research (23 papers), Methane Hydrates and Related Phenomena (18 papers) and Geochemistry and Elemental Analysis (14 papers). Koichi Iijima collaborates with scholars based in Japan, United States and Denmark. Koichi Iijima's co-authors include Yasuhiro Kato, Kentaro Nakamura, Kazutaka Yasukawa, Koichiro Fujinaga, Tatsuhiko Sakamoto, Junichiro Ohta, Tatsuo Nozaki, Katsuhiko Suzuki, Yutaro Takaya and Shiki Machida and has published in prestigious journals such as Scientific Reports, Geology and Marine Pollution Bulletin.

In The Last Decade

Koichi Iijima

48 papers receiving 1.3k citations

Peers

Countries citing papers authored by Koichi Iijima

Since Specialization

Citations

This map shows the geographic impact of Koichi Iijima'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 Koichi Iijima with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koichi Iijima more than expected).

Fields of papers citing papers by Koichi Iijima

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Koichi Iijima. 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 Koichi Iijima. The network helps show where Koichi Iijima may publish in the future.

Co-authorship network of co-authors of Koichi Iijima

This figure shows the co-authorship network connecting the top 25 collaborators of Koichi Iijima. A scholar is included among the top collaborators of Koichi Iijima based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Koichi Iijima. Koichi Iijima is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Association of Nature‐Based (Satoyama) Activities and Multiple Health Outcomes Among Older Adults: A Pilot Study 2026 ·Geriatrics and gerontology international ·(unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), (unknown), Kensuke Fukushi, Koichi Iijima	0
2	Practice of marine environmental impact assessment and monitoring using ISO standards 2023 ·Hiroyuki Yamamoto, Tetsuya Miwa, Hiroshi Koshikawa, Masanobu Kawachi, (unknown), Kosuke Tsutsumi, Koichi Iijima, Masanori Kyo, (unknown), Shinsuke Kawagucci	1
3	Massive occurrence of benthic plastic debris at the abyssal seafloor beneath the Kuroshio Extension, the North West Pacific 2021 ·Marine Pollution Bulletin ·Ryota Nakajima, Masashi Tsuchiya, Akinori Yabuki, Shuhei Masuda, Tomo Kitahashi, Yuriko Nagano, Tetsuro Ikuta, Noriyuki Isobe, Haruhiko Nakata, Heather Ritchie, K. Oguri, Satoshi Osafune, Kiichiro Kawamura, (unknown), (unknown), Koichi Iijima, Takao Yoshida, Sanae Chiba, Katsunori Fujikura	34
4	Chemostratigraphic Correlations of Deep-Sea Sediments in the Western North Pacific Ocean: A New Constraint on the Distribution of Mud Highly Enriched in Rare-Earth Elements 2020 ·Minerals ·Erika Tanaka, Kentaro Nakamura, Kazutaka Yasukawa, Kazuhide Mimura, Koichiro Fujinaga, Junichiro Ohta, Koichi Iijima, Tatsuo Nozaki, Shiki Machida, Yasuhiro Kato	28
5	Statistic and Isotopic Characterization of Deep‐Sea Sediments in the Western North Pacific Ocean: Implications for Genesis of the Sediment Extremely Enriched in Rare Earth Elements 2019 ·Geochemistry Geophysics Geosystems ·Kazutaka Yasukawa, Junichiro Ohta, Takashi Miyazaki, Bogdan Stefanov Vaglarov, Qing Chang, Kenta Ueki, Chiaki Toyama, Jun‐Ichi Kimura, Erika Tanaka, Kentaro Nakamura, Koichiro Fujinaga, Koichi Iijima, Hikaru Iwamori, Yasuhiro Kato	62
6	A Miocene impact ejecta layer in the pelagic Pacific Ocean 2019 ·Scientific Reports ·Tatsuo Nozaki, Junichiro Ohta, T. Noguchi, Honami Sato, Akira Ishikawa, Yutaro Takaya, Jun‐Ichi Kimura, Qing Chang, Kazuhiko Shimada, Jun-ichiro Ishibashi, Kazutaka Yasukawa, Katsunori Kimoto, Koichi Iijima, Yasuhiro Kato	14
7	The tremendous potential of deep-sea mud as a source of rare-earth elements 2018 ·Scientific Reports ·Yutaro Takaya, Kazutaka Yasukawa, (unknown), Koichiro Fujinaga, Junichiro Ohta, Yoichi Usui, Kentaro Nakamura, Jun‐Ichi Kimura, Qing Chang, Morihisa Hamada, Gjergj Dodbiba, Tatsuo Nozaki, Koichi Iijima, (unknown), (unknown), (unknown), Takao Ichimura, Masaki Kitazume, Toyohisa Fujita, Yasuhiro Kato	172
8	Heterogeneity of Microbial Communities on Deep-Sea Ferromanganese Crusts in the Takuyo-Daigo Seamount 2018 ·Microbes and Environments ·Shingo Kato, Tomoyo Okumura, Katsuyuki Uematsu, Miho Hirai, Koichi Iijima, Akira Usui, Katsuhiko Suzuki	20
9	Uptake of porewater phosphate by REY-rich mud in the western North Pacific Ocean 2018 ·GEOCHEMICAL JOURNAL ·Akira Ijiri, Kei Okamura, Junichiro Ohta, Yoshiro Nishio, Yohei Hamada, Koichi Iijima, Fumio Inagaki	5
10	Surface layer Nd isotopic composition of ferromanganese crusts collected from the Takuyo-Daigo Seamount reflects ambient seawater 2017 ·GEOCHEMICAL JOURNAL ·Hiroshi Amakawa, Akira Usui, Koichi Iijima, Katsuhiko Suzuki	9
11	Discovery of extremely REY-rich mud in the western North Pacific Ocean 2016 ·GEOCHEMICAL JOURNAL ·Koichi Iijima, Kazutaka Yasukawa, Koichiro Fujinaga, Kentaro Nakamura, Shiki Machida, Yutaro Takaya, Junichiro Ohta, Satoru Haraguchi, Yoshiro Nishio, Yoichi Usui, Tatsuo Nozaki, Toshitsugu Yamazaki, Yuji Ichiyama, Akira Ijiri, Fumio Inagaki, Hideaki Machiyama, Katsuhiko Suzuki, Yasuhiro Kato, (unknown)	78
12	Acoustic characterization of pelagic sediments using sub-bottom profiler data: Implications for the distribution of REY-rich mud in the Minamitorishima EEZ, western Pacific 2016 ·GEOCHEMICAL JOURNAL ·Kentaro Nakamura, Shiki Machida, Kyoko Okino, Yuka Masaki, Koichi Iijima, Katsuhiko Suzuki, Yasuhiro Kato	31
13	Chemical leaching of rare earth elements from highly REY-rich mud 2015 ·GEOCHEMICAL JOURNAL ·Yutaro Takaya, Koichiro Fujinaga, (unknown), (unknown), (unknown), Kentaro Nakamura, Koichi Iijima, Yasuhiro Kato	16
14	Diatom productivity reconstruction from chemical compositions and paleolimnology of the Late Pleistocene Takano Formation, southern Nagano City, central Japan 2010 ·The Quaternary Research (Daiyonki-Kenkyu) ·Takuma Ito, (unknown), Fujio Kumon, Koichi Iijima, Tatsuhiko Sakamoto	3
15	Spatial changes in the distributions of deep-sea “Cerviniidae” (Harpacticoida, Copepoda) and their associations with environmental factors in the bathyal zone around Sagami Bay, Japan 2007 ·Marine Biology ·Motohiro Shimanaga, (unknown), Koichi Iijima	12
16	Millennial-scale variations of sea-ice expansion in the southwestern part of the Okhotsk Sea during the past 120 kyr: Age model and ice-rafted debris in IMAGES Core MD01-2412 2006 ·Global and Planetary Change ·Tatsuhiko Sakamoto, Minoru Ikehara, Masao Uchida, Kaori Aoki, Yasuyuki Shibata, Toshiya Kanamatsu, Naomi Harada, Koichi Iijima, Kota Katsuki, (unknown)	42
17	Paleoenvironmental changes in the western Mediterranean since the last glacial maximum: High resolution multiproxy record from the Algero–Balearic basin 2006 ·Palaeogeography Palaeoclimatology Palaeoecology ·F.J. Jiménez-Espejo, Francisca Martínez‐Ruiz, Tatsuhiko Sakamoto, Koichi Iijima, David Gallego-Torres, Naomi Harada	61
18	Genetics of Immunoglobulin A Nephropathy 2000 ·Annals of the Academy of Medicine Singapore ·Ryojiro Tanaka, Koichi Iijima, H Nakamura, Nori Yoshikawa	3
19	Halofuginone inhibits neointimal formation of cultured rat aorta in a concentration-dependent fashion in vitro 1998 ·Heart and Vessels ·Kexiang Liu, (unknown), Yoshikazu Goto, Koichi Iijima, (unknown), (unknown), M. Matsukawa, Toshiki Abe	9
20	Histochemical studies on the pigments and distribution of various enzymes in the dorsal vagal nucleus and hypoglossal nucleus of the squirrel monkey. 1969 ·PubMed ·Koichi Iijima, Totada R. Shantha, G. H. Bourne	2

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.

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