This map shows the geographic impact of Kei 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 Kei Okamura with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kei Okamura more than expected).
This network shows the impact of papers produced by Kei 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 Kei Okamura. The network helps show where Kei Okamura may publish in the future.
Co-authorship network of co-authors of Kei Okamura
This figure shows the co-authorship network connecting the top 25 collaborators of Kei Okamura.
A scholar is included among the top collaborators of Kei 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 Kei Okamura. Kei Okamura is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Okino, Kyoko, Masakazu Fujii, Ryuichi Shinjo, et al.. (2018). Tectonics of volcanic and hydrothermal area, north/west of Kumejima Island: Preliminary results of KS-17-14 cruise. Japan Geoscience Union.1 indexed citations
Noguchi, Takuroh, Michinari Sunamura, Hajime Yamamoto, et al.. (2009). An exploration for hydrothermal plume evolution using the AUV "URASHIMA" with fluid sampling system at southern Mariana Trough. AGUFM. 2009.1 indexed citations
Yamanaka, Toshiro, Hideo Akashi, Hitoshi Chiba, et al.. (2008). Unique shallow-water hydrothermal system associated with submarine volcanism in the Aira caldera, South Kyushu, Japan. Geochimica et Cosmochimica Acta Supplement. 72(12).1 indexed citations
Yamanaka, Toshiro, Hiroyuki Kimura, Akinari Hirota, et al.. (2004). Geochemistry of Hydrothermal Fluids in South Mariana Backarc Spreading Center. AGUFM. 2004.11 indexed citations
15.
Okamura, Kei, et al.. (2004). In Situ Observations of Dissolved Manganese in Hydrothermal Vent Plumes at Mariana Trough.. AGUFM. 2004.3 indexed citations
16.
Nakano, Akimasa, et al.. (2002). Periodic sampling of diffuse flow to monitor chemical fluctuation. AGUFM. 2002.
17.
Ishibashi, J., Yusuke V. Morimoto, Tomohiro Toki, et al.. (2002). Concentration of Biologically Important Chemical Species in Hydrothermal Fluids from Submarine Arc Volcano Suiyo Seamount. AGU Fall Meeting Abstracts. 2002.2 indexed citations
18.
Gamo, Toshitaka, Hiroshi Hasumoto, Kei Okamura, et al.. (2001). Geochemical Evidence for Submarine Hydrothermal Activity in the Gulf of Aden, Northwestern Indian Ocean. AGU Fall Meeting Abstracts. 2001.1 indexed citations
19.
Auzende, J.M., T. Urabe, Étienne Ruellan, et al.. (1996). SHINKAI 6500 dives in the Manus Basin: New STARMER Japanese-French Program. Deep Sea Research. 12. 323–334.11 indexed citations
20.
Minato, Kazuya, et al.. (1991). Preparation of artificial waterlogged wood II. Comparison of some characteristics of wood degraded by Fenton's reagent with those of waterlogged wood. Journal of the Japan Wood Research Society. 37(5). 473–480.1 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.