Hisao Nagai

1.2k total citations
59 papers, 967 citations indexed

About

Hisao Nagai is a scholar working on Radiation, Global and Planetary Change and Atmospheric Science. According to data from OpenAlex, Hisao Nagai has authored 59 papers receiving a total of 967 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Radiation, 14 papers in Global and Planetary Change and 11 papers in Atmospheric Science. Recurrent topics in Hisao Nagai's work include Radioactive contamination and transfer (14 papers), Nuclear Physics and Applications (9 papers) and Geology and Paleoclimatology Research (9 papers). Hisao Nagai is often cited by papers focused on Radioactive contamination and transfer (14 papers), Nuclear Physics and Applications (9 papers) and Geology and Paleoclimatology Research (9 papers). Hisao Nagai collaborates with scholars based in Japan and United States. Hisao Nagai's co-authors include Mineo Hiramatsu, Toshio Goto, Masaru Hori, Hiroyuki Matsuzaki, Takeyasu Yamagata, Seigou Takashima, T. Kobayashi, Sakae Yumoto, Hirofumi Tazoe and Jing Zhang and has published in prestigious journals such as Applied Physics Letters, Journal of Applied Physics and Geochimica et Cosmochimica Acta.

In The Last Decade

Hisao Nagai

56 papers receiving 917 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hisao Nagai Japan 15 258 217 156 154 144 59 967
Johanna Sabine Becker Germany 18 56 0.2× 251 1.2× 106 0.7× 114 0.7× 33 0.2× 30 1.4k
Mikhail A. Bolshov Russia 19 217 0.8× 145 0.7× 89 0.6× 27 0.2× 161 1.1× 86 1.4k
J. D. Fassett United States 20 45 0.2× 169 0.8× 52 0.3× 57 0.4× 68 0.5× 46 1.2k
Carola Pickhardt Germany 24 45 0.2× 349 1.6× 113 0.7× 193 1.3× 18 0.1× 34 1.7k
Β. Kubica Poland 13 36 0.1× 171 0.8× 45 0.3× 177 1.1× 27 0.2× 63 616
R.M. Williams United States 13 445 1.7× 204 0.9× 214 1.4× 30 0.2× 224 1.6× 37 1.0k
Tsutomu Miura Japan 15 165 0.6× 95 0.4× 62 0.4× 78 0.5× 18 0.1× 83 745
E. Roth France 16 77 0.3× 303 1.4× 283 1.8× 14 0.1× 380 2.6× 34 1.2k
Kyuseok Song South Korea 20 114 0.4× 157 0.7× 375 2.4× 70 0.5× 39 0.3× 95 1.4k
Paul J. Paulsen United States 18 34 0.1× 102 0.5× 131 0.8× 37 0.2× 72 0.5× 41 1.2k

Countries citing papers authored by Hisao Nagai

Since Specialization
Citations

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

Fields of papers citing papers by Hisao Nagai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hisao Nagai

This figure shows the co-authorship network connecting the top 25 collaborators of Hisao Nagai. A scholar is included among the top collaborators of Hisao Nagai 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 Hisao Nagai. Hisao Nagai is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Kumamoto, Yuichiro, Yasunori Hamajima, Hideki Kaeriyama, & Hisao Nagai. (2025). Fukushima-derived radiocesium tracks the mode waters in the western subtropical area of the North Pacific. Journal of Oceanography. 81(3). 187–201.
2.
Kumamoto, Yuichiro, Yasunori Hamajima, Shigeto Nishino, et al.. (2024). Temporal changes in iodine-129 and radiocesium in the Canada Basin in the Arctic Ocean between 1993 and 2020. Polar Science. 41. 101071–101071.
3.
Qi, Yuanzhi, Hiroyuki Matsuzaki, Takeyasu Yamagata, & Hisao Nagai. (2023). Iodine cycling in the subarctic Pacific Ocean: Insights from 129I. Geochimica et Cosmochimica Acta. 344. 12–23. 7 indexed citations
4.
Kumamoto, Yuichiro, Michio Aoyama, Yasunori Hamajima, et al.. (2022). Zonal and vertical transports of Fukushima-derived radiocesium in the subarctic gyre of the North Pacific until 2014. Journal of Environmental Radioactivity. 247. 106864–106864. 9 indexed citations
5.
Kumamoto, Yuichiro, Masatoshi Yamada, Michio Aoyama, et al.. (2018). Radiocesium in North Pacific coastal and offshore areas of Japan within several months after the Fukushima accident. Journal of Environmental Radioactivity. 198. 79–88. 20 indexed citations
6.
7.
Kumamoto, Yuichiro, Michio Aoyama, Yasunori Hamajima, et al.. (2016). Fukushima-derived radiocesium in the western North Pacific in 2014. Journal of Radioanalytical and Nuclear Chemistry. 311(2). 1209–1217. 25 indexed citations
8.
Honda, Maki, Hiroyuki Matsuzaki, Yasuto Miyake, et al.. (2015). Depth profile and mobility of 129I and 137Cs in soil originating from the Fukushima Dai-ichi Nuclear Power Plant accident. Journal of Environmental Radioactivity. 146. 35–43. 32 indexed citations
9.
Tazoe, Hirofumi, Takeyasu Yamagata, Hajime Obata, & Hisao Nagai. (2014). Determination of picomolar beryllium levels in seawater with inductively coupled plasma mass spectrometry following silica-gel preconcentration. Analytica Chimica Acta. 852. 74–81. 13 indexed citations
10.
Matsumura, Hiroshi, Toshiya Sanami, K. Masumoto, et al.. (2005). Target dependence of beryllium fragment production in neutron- and alpha-induced nuclear reactions at intermediate energies. Radiochimica Acta. 93(9-10). 497–501. 1 indexed citations
11.
Matsumura, Hiroshi, Takahiro Aze, Y. Oura, et al.. (2004). Yield measurements for 7Be and 10Be productions from natCu, natAg and 197Au by bremsstrahlung irradiation at E0=200 MeV. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 223-224. 807–811. 2 indexed citations
12.
Ito, Masafumi, Keigo Takeda, Tatsuo Shiina, et al.. (2004). Silicon–oxide etching process employing an electron-beam-excited plasma. Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures Processing Measurement and Phenomena. 22(2). 543–547. 1 indexed citations
13.
Nagai, Hisao, Mineo Hiramatsu, Masaru Hori, & Toshio Goto. (2003). Measurement of oxygen atom density employing vacuum ultraviolet absorption spectroscopy with microdischarge hollow cathode lamp. Review of Scientific Instruments. 74(7). 3453–3459. 71 indexed citations
14.
Yumoto, Sakae, et al.. (2003). 26Al incorporation into the brain of suckling rats through maternal milk. Journal of Inorganic Biochemistry. 97(1). 155–160. 26 indexed citations
15.
Yumoto, Sakae, et al.. (2001). Aluminium incorporation into the brain of rat fetuses and sucklings. Brain Research Bulletin. 55(2). 229–234. 72 indexed citations
16.
Yoneda, Shigekazu, et al.. (1990). Y-Ho fractionations and REE abundances in Allende inclusions. Meteoritics and Planetary Science. 25. 421.
17.
Imamura, Mineo, Hisao Nagai, Kunio Yoshida, et al.. (1990). Static operation of an AMS system using the beam monitor method. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 52(3-4). 254–258. 8 indexed citations
18.
Kobayashi, Koichi, et al.. (1990). 26Al tracer experiment by accelerator mass spectrometry and its application to the studies for amyotrophic lateral sclerosis and Alzheimer's disease. I.. Proceedings of the Japan Academy Series B. 66(10). 189–192. 26 indexed citations
19.
Nagai, Hisao, et al.. (1988). Scandium 45 in meteoritic irons. Institutional Repository National Institute of Polar Research (National Institute of Polar Research (Japan)). 1. 197–205. 1 indexed citations
20.
Nagai, Hisao, et al.. (1987). Reliability, detection limit and depth resolution of the elastic recoil measurement of hydrogen. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms. 28(1). 59–66. 5 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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