Hiroshi Okamura

1.7k total citations
86 papers, 1.3k citations indexed

About

Hiroshi Okamura is a scholar working on Global and Planetary Change, Ecology and Nature and Landscape Conservation. According to data from OpenAlex, Hiroshi Okamura has authored 86 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 44 papers in Global and Planetary Change, 38 papers in Ecology and 29 papers in Nature and Landscape Conservation. Recurrent topics in Hiroshi Okamura's work include Marine and fisheries research (42 papers), Fish Ecology and Management Studies (23 papers) and Marine Bivalve and Aquaculture Studies (21 papers). Hiroshi Okamura is often cited by papers focused on Marine and fisheries research (42 papers), Fish Ecology and Management Studies (23 papers) and Marine Bivalve and Aquaculture Studies (21 papers). Hiroshi Okamura collaborates with scholars based in Japan, United States and United Kingdom. Hiroshi Okamura's co-authors include Momoko Ichinokawa, Masashi Kiyota, Akinori Takasuka, Taro Ichii, Makoto Okazaki, Kotaro Yokawa, Shinto Eguchi, Mio Takahashi, Shota Nishijima and Hiroyuki Kurota and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Physical Review Letters and SHILAP Revista de lepidopterología.

In The Last Decade

Hiroshi Okamura

74 papers receiving 1.2k citations

Peers

Hiroshi Okamura
S. Tanaka Japan
Michael H. Williamson United States
Jane W. Behrens Denmark
R. Müller Germany
M. Elfman Sweden
D. James Baker United Kingdom
Sven Sebastian Uhlmann Australia
Francesco Nonnis Marzano Italy
Wendy E. Morrison United States
Anthony J. Booth South Africa
S. Tanaka Japan
Hiroshi Okamura
Citations per year, relative to Hiroshi Okamura Hiroshi Okamura (= 1×) peers S. Tanaka

Countries citing papers authored by Hiroshi Okamura

Since Specialization
Citations

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

Fields of papers citing papers by Hiroshi Okamura

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroshi Okamura

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroshi Okamura. A scholar is included among the top collaborators of Hiroshi Okamura 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 Okamura. Hiroshi Okamura 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.
Matsumoto, Osamu, et al.. (2025). Oxygen content of α-silicon nitride powder depending on the synthesis method. Journal of the Ceramic Society of Japan. 133(4). 161–165.
2.
Okamura, Hiroshi, S. Morita, & Hiroshi Kuroda. (2024). Forecasting fish recruitment using machine learning methods: A case study of arabesque greenling. Fisheries Research. 278. 107096–107096.
3.
Okamura, Hiroshi, et al.. (2023). Spatio‐temporal model and machine learning method reveal patterns and processes of migration under climate change. Journal of Biogeography. 51(4). 522–532. 9 indexed citations
4.
5.
6.
Okamura, Hiroshi, et al.. (2022). Which fisheries and biological factors affect the misclassification of stock status determined by data-limited methods?. Fisheries Research. 257. 106491–106491. 1 indexed citations
7.
Nishijima, Shota, et al.. (2020). State‐space modeling clarifies productivity regime shifts of Japanese flying squid. Population Ecology. 63(1). 27–40. 8 indexed citations
8.
9.
Okamura, Hiroshi, Shiro Ikeda, Takami Morita, & Shinto Eguchi. (2016). Risk assessment of radioisotope contamination for aquatic living resources in and around Japan. Proceedings of the National Academy of Sciences. 113(14). 3838–3843. 30 indexed citations
10.
Ichinokawa, Momoko, Hiroshi Okamura, Kazuhiro Oshima, Kotaro Yokawa, & Yukio Takeuchi. (2014). Spatiotemporal catch distribution of age-0 Pacific bluefin tuna Thunnus orientalis caught by the Japanese troll fishery in relation to surface sea temperature and seasonal migration. Fisheries Science. 80(6). 1181–1191. 16 indexed citations
11.
Chow, Seinen, Toshihiro Yamamoto, Kazutoshi Watanabe, et al.. (2013). Locality difference in the frequency of asymmetric shell marking type of the Manila clam Ruditapes philippinarum. NIPPON SUISAN GAKKAISHI. 79(2). 190–197. 2 indexed citations
12.
Doi, Hideyuki & Hiroshi Okamura. (2011). Similarity indices, ordination, and community analysis tests using the software R. Nihon Seitai Gakkaishi. 61(1). 3–20. 14 indexed citations
13.
Amano, Tatsuya, Yoshinobu Kusumoto, Hiroshi Okamura, et al.. (2011). A macro-scale perspective on within-farm management: how climate and topography alter the effect of farming practices. Ecology Letters. 14(12). 1263–1272. 30 indexed citations
14.
Okamura, Hiroshi, Shingo Minamikawa, Hans J. Skaug, & Toshiya Kishiro. (2011). Abundance Estimation of Long‐Diving Animals Using Line Transect Methods. Biometrics. 68(2). 504–513. 18 indexed citations
15.
Yokota, Kosuke, Masashi Kiyota, & Hiroshi Okamura. (2009). Effect of bait species and color on sea turtle bycatch and fish catch in a pelagic longline fishery. Fisheries Research. 97(1-2). 53–58. 45 indexed citations
16.
Kiyota, Masashi & Hiroshi Okamura. (2005). HARASSMENT, ABDUCTION, AND MORTALITY OF PUPS BY NONTERRITORIAL MALE NORTHERN FUR SEALS. Journal of Mammalogy. 86(6). 1227–1236. 21 indexed citations
17.
Okamura, Hiroshi, et al.. (2003). Abundance Estimation of Diving Animals by the Double‐Platform Line Transect Method. Biometrics. 59(3). 512–520. 19 indexed citations
18.
Mizuno, Keisuke, Makoto Okazaki, Hideki Nakano, & Hiroshi Okamura. (1999). Estimating the underwater shape of tuna longlines with micro-bathythermographs. 15 indexed citations
19.
Okamura, Hiroshi, et al.. (1964). On the States of Stress Distribution around the Crossing Gallery. Journal of the Mining and Metallurgical Institute of Japan. 80(914). 659–664. 2 indexed citations
20.
Okamura, Hiroshi, et al.. (1960). On the States of Stress Distribution around the Gallery in Stratified Rock. Journal of the Mining and Metallurgical Institute of Japan. 76(867). 614–620. 1 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by S. Tanaka Breakdown of academic impact, for papers by Michael H. Williamson Breakdown of academic impact, for papers by Jane W. Behrens Breakdown of academic impact, for papers by R. Müller Breakdown of academic impact, for papers by M. Elfman Breakdown of academic impact, for papers by D. James Baker Breakdown of academic impact, for papers by Sven Sebastian Uhlmann Breakdown of academic impact, for papers by Francesco Nonnis Marzano Breakdown of academic impact, for papers by Wendy E. Morrison Breakdown of academic impact, for papers by Anthony J. Booth
Rankless by CCL
2026