Hiroshi Amakawa

3.9k total citations · 1 hit paper
43 papers, 3.3k citations indexed

About

Hiroshi Amakawa is a scholar working on Geochemistry and Petrology, Atmospheric Science and Ecology. According to data from OpenAlex, Hiroshi Amakawa has authored 43 papers receiving a total of 3.3k indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Geochemistry and Petrology, 20 papers in Atmospheric Science and 12 papers in Ecology. Recurrent topics in Hiroshi Amakawa's work include Geochemistry and Elemental Analysis (30 papers), Geology and Paleoclimatology Research (20 papers) and Heavy metals in environment (10 papers). Hiroshi Amakawa is often cited by papers focused on Geochemistry and Elemental Analysis (30 papers), Geology and Paleoclimatology Research (20 papers) and Heavy metals in environment (10 papers). Hiroshi Amakawa collaborates with scholars based in Japan, Taiwan and United States. Hiroshi Amakawa's co-authors include Yoshiyuki Nozaki, Jing Zhang, Hiroshi Shimizu, Yoshihiro Asahara, Takanori Nakano, Dia Sotto Alibo, Hikari Kamioka, Takanori Kunimaru, Masaharu Tanimizu and Masaki Yuhara and has published in prestigious journals such as Nature Communications, Geochimica et Cosmochimica Acta and Earth and Planetary Science Letters.

In The Last Decade

Hiroshi Amakawa

43 papers receiving 3.3k 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.

JNdi-1: a neodymium isotopic reference in consistency with LaJolla neodymium

2000 1.5k citations Hiroshi Amakawa, Takanori Nakano et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Hiroshi Amakawa Japan	20	1.7k	1.6k	1.2k	673	579	43	3.3k
Masaharu Tanimizu Japan	31	1.9k 1.1×	1.3k 0.8×	916 0.8×	680 1.0×	614 1.1×	73	3.8k
Alan Greig Australia	31	2.7k 1.5×	1.3k 0.8×	1.1k 0.9×	1.1k 1.6×	1.2k 2.1×	68	4.5k
Steven J. Goldstein United States	20	2.0k 1.1×	1.3k 0.8×	1.1k 1.0×	364 0.5×	758 1.3×	37	3.3k
Wafa Abouchami Germany	39	2.4k 1.4×	1.3k 0.8×	1.3k 1.1×	575 0.9×	912 1.6×	64	4.6k
Nadine Mattielli Belgium	41	2.8k 1.6×	998 0.6×	1.1k 1.0×	769 1.1×	827 1.4×	149	5.1k
Pieter Z. Vroon Netherlands	38	3.1k 1.8×	1.2k 0.7×	798 0.7×	693 1.0×	911 1.6×	75	4.4k
Philip Fralick Canada	26	1.1k 0.6×	1.5k 0.9×	874 0.7×	1.5k 2.2×	388 0.7×	77	2.6k
Claudio Gaucher Uruguay	34	1.8k 1.0×	1.7k 1.0×	741 0.6×	2.0k 3.0×	740 1.3×	80	3.4k
Craig C. Lundstrom United States	41	3.1k 1.8×	1.2k 0.8×	870 0.7×	522 0.8×	971 1.7×	120	4.9k
Koshi Yamamoto Japan	29	1.8k 1.0×	1.1k 0.7×	696 0.6×	822 1.2×	635 1.1×	144	3.0k

Countries citing papers authored by Hiroshi Amakawa

Since Specialization

Citations

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

Fields of papers citing papers by Hiroshi Amakawa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroshi Amakawa

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

Tazoe, Hirofumi, Hiroshi Amakawa, Katsuhiko Suzuki, et al.. (2021). Determination of Nd isotopic composition in seawater using newly developed solid phase extraction and MC-ICP-MS. Talanta. 232. 122435–122435. 10 indexed citations

Nakano, Takanori, Jun Matsubayashi, Hiroshi Amakawa, et al.. (2018). Utility of Nd isotope ratio as a tracer of marine animals: regional variation in coastal seas and causal factors. Ecosphere. 9(8). 7 indexed citations

Amano, Yosuke, Toshiro Takahashi, Kotaro Shirai, et al.. (2018). Low-fidelity homing behaviour of Biwa salmon Oncorhynchus sp. landlocked in Lake Biwa as inferred from otolith elemental and Sr isotopic compositions. Fisheries Science. 84(5). 799–813. 3 indexed citations

Horikawa, Keiji, et al.. (2018). Late Miocene–mid-Pliocene tectonically induced formation of the semi-closed Japan Sea, inferred from seawater Nd isotopes. Geology. 46(10). 903–906. 17 indexed citations

Amakawa, Hiroshi, Akira Usui, Koichi Iijima, & Katsuhiko Suzuki. (2017). Surface layer Nd isotopic composition of ferromanganese crusts collected from the Takuyo-Daigo Seamount reflects ambient seawater. GEOCHEMICAL JOURNAL. 51(1). e1–e7. 9 indexed citations

Liu, Yi, Li Lo, Zhengguo Shi, et al.. (2015). Obliquity pacing of the western Pacific Intertropical Convergence Zone over the past 282,000 years. Nature Communications. 6(1). 10018–10018. 132 indexed citations

Amakawa, Hiroshi, Hirofumi Tazoe, Hajime Obata, et al.. (2013). Neodymium isotopic composition and concentration in the Southwest Pacific Ocean. GEOCHEMICAL JOURNAL. 47(4). 409–422. 22 indexed citations

Sano, Yuji, Kotaro Shirai, Naoto Takahata, Hiroshi Amakawa, & Tsuguo Otake. (2008). Ion microprobe Sr isotope analysis of carbonates with about 5 μm spatial resolution: An example from an ayu otolith. Applied Geochemistry. 23(8). 2406–2413. 16 indexed citations

Amakawa, Hiroshi, et al.. (2007). Vertical distribution of scandium in the north central Pacific. Geophysical Research Letters. 34(11). 10 indexed citations

10.

Tazoe, Hirofumi, Hajime Obata, Hiroshi Amakawa, Yoshiyuki Nozaki, & Toshitaka Gamo. (2006). Precise determination of the cerium isotopic compositions of surface seawater in the Northwest Pacific Ocean and Tokyo Bay. Marine Chemistry. 103(1-2). 1–14. 16 indexed citations

11.

Amakawa, Hiroshi, et al.. (2005). Precise determination of Sc in natural waters by neutron activation analysis coupled with preconcentration of Sc. Analytica Chimica Acta. 553(1-2). 58–63. 6 indexed citations

12.

Arakawa, Yoji, Kye‐Hun Park, Namhoon Kim, Yong-Sun Song, & Hiroshi Amakawa. (2003). Geochemistry and tectonic implications of Proterozoic amphibolites in the northeastern part of the Yeongnam massif, South Korea. Island Arc. 12(2). 180–189. 7 indexed citations

13.

Amakawa, Hiroshi, Dia Sotto Alibo, & Yoshiyuki Nozaki. (2000). Nd isotopic composition and REE pattern in the surface waters of the eastern Indian Ocean and its adjacent seas. Geochimica et Cosmochimica Acta. 64(10). 1715–1727. 130 indexed citations

14.

Amakawa, Hiroshi, et al.. (2000). Boron isotope variations in the atmosphere. Tellus B. 52(4). 1057–1057. 29 indexed citations

15.

Amakawa, Hiroshi, Dia Sotto Alibo, & Yoshiyuki Nozaki. (1999). Vertical and Horizontal Distributions of Neodymium-Isotopic Ratio of the Northwestern Pacific, Sea of Okhotsk, and Japan Sea. 7170. 1 indexed citations

16.

Sano, Yuji, Kentaro Terada, Hiroshi Hidaka, et al.. (1999). Ion-Microprobe Analysis of Rare Earth Elements in Oceanic Basalt Glass. Analytical Sciences. 15(8). 743–748. 19 indexed citations

17.

Nozaki, Yoshiyuki, et al.. (1999). Dissolved rare earth elements and hydrography in the Sulu Sea. Geochimica et Cosmochimica Acta. 63(15). 2171–2181. 97 indexed citations

18.

Alibo, Dia Sotto, Hiroshi Amakawa, & Yoshiyuki Nozaki. (1998). Determination of indium in natural waters by flow injection inductively coupled plasma mass spectrometry. Journal of Earth System Science. 107(4). 359–366. 20 indexed citations

19.

Nozaki, Yoshiyuki, Jing Zhang, & Hiroshi Amakawa. (1997). The fractionation between Y and Ho in the marine environment. Earth and Planetary Science Letters. 148(1-2). 329–340. 491 indexed citations

20.

Amakawa, Hiroshi, et al.. (1994). The comparative behaviors of yttrium and lanthanides in the seawater of the North Pacific. Geophysical Research Letters. 21(24). 2677–2680. 139 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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