Takashi Ishimaru

3.5k total citations · 1 hit paper
126 papers, 2.9k citations indexed

About

Takashi Ishimaru is a scholar working on Oceanography, Global and Planetary Change and Ecology. According to data from OpenAlex, Takashi Ishimaru has authored 126 papers receiving a total of 2.9k indexed citations (citations by other indexed papers that have themselves been cited), including 77 papers in Oceanography, 41 papers in Global and Planetary Change and 39 papers in Ecology. Recurrent topics in Takashi Ishimaru's work include Marine and coastal ecosystems (59 papers), Marine Biology and Ecology Research (25 papers) and Isotope Analysis in Ecology (19 papers). Takashi Ishimaru is often cited by papers focused on Marine and coastal ecosystems (59 papers), Marine Biology and Ecology Research (25 papers) and Isotope Analysis in Ecology (19 papers). Takashi Ishimaru collaborates with scholars based in Japan, Australia and United States. Takashi Ishimaru's co-authors include Reiko Suzuki, Masaaki Kodama, Toshiro Saino, Jota Kanda, Takehiro Ogata, Reiko Sato, Sanae Chiba, Takehiko Ogata, Yukuya Yamaguchi and Yuji Tanaka and has published in prestigious journals such as SHILAP Revista de lepidopterología, Journal of Geophysical Research Atmospheres and Environmental Science & Technology.

In The Last Decade

Takashi Ishimaru

122 papers receiving 2.7k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

An improved method for the determination of phytoplankton chlorophyll using N, N-dimethylformamide

1990 636 citations Takashi Ishimaru et al. Journal of Oceanography profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Takashi Ishimaru Japan	27	2.0k	1.2k	914	620	276	126	2.9k
Clare Bradshaw Sweden	23	480 0.2×	651 0.6×	849 0.9×	65 0.1×	58 0.2×	69	1.6k
JL Teyssié Monaco	26	701 0.4×	635 0.5×	696 0.8×	132 0.2×	20 0.1×	35	1.9k
Lawrence F. Small United States	29	1.6k 0.8×	899 0.8×	671 0.7×	443 0.7×	97 0.4×	63	2.4k
Nadine Le Bris France	35	2.0k 1.0×	2.1k 1.8×	892 1.0×	390 0.6×	405 1.5×	91	3.5k
Hans Kautsky Sweden	19	683 0.3×	386 0.3×	486 0.5×	61 0.1×	51 0.2×	62	1.3k
Patrick Raimbault France	44	4.1k 2.0×	2.3k 2.0×	1.1k 1.2×	660 1.1×	255 0.9×	141	5.0k
Masumi Yamamuro Japan	28	943 0.5×	1.2k 1.1×	593 0.6×	429 0.7×	67 0.2×	132	2.8k
Ricardo Riso France	25	663 0.3×	520 0.4×	275 0.3×	211 0.3×	111 0.4×	74	1.8k
Carlos Alonso‐Hernández Cuba	25	242 0.1×	253 0.2×	349 0.4×	227 0.4×	46 0.2×	90	1.6k
Antonio Cruzado Spain	20	895 0.5×	494 0.4×	568 0.6×	247 0.4×	93 0.3×	50	1.8k

Countries citing papers authored by Takashi Ishimaru

Since Specialization

Citations

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

Fields of papers citing papers by Takashi Ishimaru

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takashi Ishimaru

This figure shows the co-authorship network connecting the top 25 collaborators of Takashi Ishimaru. A scholar is included among the top collaborators of Takashi Ishimaru 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 Takashi Ishimaru. Takashi Ishimaru 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

Tateda, Yutaka, Michio Aoyama, Yasunori Hamajima, et al.. (2024). Radioecological behaviour of 137Cs in rockfish of the southern coastal waters off Fukushima during 2017–2021. Journal of Environmental Radioactivity. 273. 107386–107386. 2 indexed citations

Katano, Toshiya, Kenji Yoshino, Chiho Sukigara, et al.. (2023). Succession of three dominant diatoms, Skeletonema, Thalassiosira, and Pseudo-nitzschia in the inner area of Tokyo Bay from 2003 to 2017. Journal of Oceanography. 79(3). 265–279. 1 indexed citations

Hirawake, Toru, Takashi Ishimaru, Yukari Ito, et al.. (2022). Benthic food web structures as an explanation for prolonged ecological half-life of 137Cs in flatfish species in the Fukushima coastal area. Journal of Environmental Radioactivity. 246. 106844–106844. 3 indexed citations

Uchiyama, Yusuke, Daisuke Tsumune, Toshiki Iwasaki, et al.. (2021). A storm-induced flood and associated nearshore dispersal of the river-derived suspended 137Cs. The Science of The Total Environment. 816. 151573–151573. 12 indexed citations

Kubo, Atsushi, Yukari Ito, Takashi Ishimaru, et al.. (2020). Changes in radioactive cesium concentrations from 2011 to 2017 in Fukushima coastal sediments and relative contributions of radioactive cesium-bearing microparticles. Marine Pollution Bulletin. 161(Pt B). 111769–111769. 9 indexed citations

Uchiyama, Yusuke, Daisuke Tsumune, Masatoshi Yamada, et al.. (2019). COASTAL TRANSPORT OF SEDIMENTS AND SUSPENDED RADIOCESIUM IN THE FUKUSHIMA COAST DUE TO A TYPHOON-INDUCED FLOOD EVENT. Journal of Japan Society of Civil Engineers Ser B2 (Coastal Engineering). 75(2). I_667–I_672.

Tateda, Yutaka, Daisuke Tsumune, Kazuhiro Misumi, et al.. (2016). Biokinetics of radiocesium depuration in marine fish inhabiting the vicinity of the Fukushima Dai-ichi Nuclear Power Plant. Journal of Environmental Radioactivity. 166(Pt 1). 67–73. 11 indexed citations

Amakasu, Kazuo, et al.. (2011). Distribution and density of Antarctic krill (Euphausia superba) and ice krill (E. crystallorophias) off Adélie Land in austral summer 2008 estimated by acoustical methods. Polar Science. 5(2). 187–194. 21 indexed citations

Moteki, Masato, et al.. (2010). Structure of the pelagic cnidarian community in Lützow–Holm Bay in the Indian sector of the Southern Ocean. Polar Science. 4(2). 387–404. 15 indexed citations

10.

Moteki, Masato, et al.. (2008). Report on "Workshop-Southern Ocean Study by RT/V Umitaka-Maru, 2008". SHILAP Revista de lepidopterología. 2 indexed citations

11.

Kanda, Jota, et al.. (2008). Time-series Variations in Nutrient Concentrations at Two Monitoring Stations in Tokyo Bay. Journal of Japan Society on Water Environment. 31(9). 559–564. 11 indexed citations

12.

Saito, Hiroshi, et al.. (2008). Development of a monitoring method for coral health using visible and near infrared images. 10(1). 47–57. 1 indexed citations

13.

Fujiki, Tetsuichi, et al.. (2008). In situ observation of phytoplankton productivity by an underwater profiling buoy system: use of fast repetition rate fluorometry. Marine Ecology Progress Series. 353. 81–88. 33 indexed citations

14.

Ishimaru, Takashi, et al.. (2006). Growth of the Dinoflagellate Alexandrium tamarense Isolated from Jinhae Bay, Korea in Axenic Cultures. 24(3). 275–281. 2 indexed citations

15.

Takahashi, Takashi, et al.. (2004). Post-embryonic development and reproduction of Pseudodiaptomus annandalei (Copepoda: Calanoida). 51(1). 15–25. 30 indexed citations

16.

Kitamura, Minoru, Yuji Tanaka, & Takashi Ishimaru. (2003). Coarse scale distributions and community structure of hydromedusae related to water mass structures in two locations of Japanese waters in early summer. 50(2). 43–54. 9 indexed citations

17.

Ishimaru, Takashi, et al.. (2002). Laboratory study of growth of the lobate ctenophore Bolinopsis mikado (Moser). 49(2). 81–87. 2 indexed citations

18.

Ishimaru, Takashi, et al.. (2000). Initial incorporation of phytoplankton into young ice in Saroma Ko lagoon, Hokkaido, Japan. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 13. 15–27. 8 indexed citations

19.

Tanaka, Yuji, et al.. (1999). New apparatuses for cultivation of appendicularians. 46(2). 162–164. 15 indexed citations

20.

Ishimaru, Takashi, Hiroo Inouye, & Tohru Morioka. (1990). Risk assessment of drinking water in a reservoir contaminated by PAH's originated from road traffic. The Science of The Total Environment. 93. 125–130. 8 indexed citations

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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