Takeo Koyama

471 total citations
74 papers, 351 citations indexed

About

Takeo Koyama is a scholar working on Ocean Engineering, Plant Science and Control and Systems Engineering. According to data from OpenAlex, Takeo Koyama has authored 74 papers receiving a total of 351 indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Ocean Engineering, 12 papers in Plant Science and 7 papers in Control and Systems Engineering. Recurrent topics in Takeo Koyama's work include Maritime Navigation and Safety (14 papers), Ship Hydrodynamics and Maneuverability (13 papers) and Rice Cultivation and Yield Improvement (10 papers). Takeo Koyama is often cited by papers focused on Maritime Navigation and Safety (14 papers), Ship Hydrodynamics and Maneuverability (13 papers) and Rice Cultivation and Yield Improvement (10 papers). Takeo Koyama collaborates with scholars based in Japan, Thailand and United States. Takeo Koyama's co-authors include Madoka Sutoh, Tadakatsu Yoneyama, Hiroyuki Yamato, Yan Jin, Kazuhiko Hasegawa, T Mochizuki, Katsumi Kaneko, Akira Marui, Takuro Wada and M. Matoba and has published in prestigious journals such as European Heart Journal, Journal of Vascular Surgery and Bulletin of the Chemical Society of Japan.

In The Last Decade

Takeo Koyama

64 papers receiving 307 citations

Peers

Takeo Koyama
Comparison fields: 5 of 80
  • Ecology 114
  • Ocean Engineering 93
  • Plant Science 51
  • Paleontology 42
  • Control and Systems Engineering 36
Replace Yasuhiro Kuwahara with:
Yasuhiro Kuwahara Japan
Zhiping Zhao China
Martin Sauerbier Switzerland
Bruce J. Holmes United States
N.H. Hancock Australia
Junjun Wu China
M.J. Dwyer United Kingdom
Wenhui Zhao China
Patricia L. Andrews United States
Yasuhiro Kuwahara Japan View profile →
Citations per field, relative to Takeo Koyama
Takeo Koyama · 1×
Citations per year, relative to Takeo Koyama
Takeo Koyama · 1×

Countries citing papers authored by Takeo Koyama

Since Specialization
Citations

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

Fields of papers citing papers by Takeo Koyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takeo Koyama

This figure shows the co-authorship network connecting the top 25 collaborators of Takeo Koyama. A scholar is included among the top collaborators of Takeo Koyama 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 Takeo Koyama. Takeo Koyama 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
# Work Indexed citations
1 0
2 2
3 1
4 1
5
An Approach to Knowledge Acquisition for the Hull Form Design of Fishing Crafts:2nd Report : Object Oriented Methodology for the Rapid Development of Procedural Tools and Interactive Elicitation for Hull Selection
2
6
Uptake and Translocation of Nitrogen in Satsuma Mandarin Trees
3
7 1
8 1
9 2
10 12
11 9
12
Determination of Nitrogen-Supplying Capacity of Soils Using 15N Tracer Technique
2
13 0
14
Effect of transplanting time on rice plant growth and grain yield in Thailand
2
15
Nitrogen application technology for tropical rice as determined by field experiments using 15N tracer technique
13
16
ON WAVE EXCITATIONLESS SHIP FORMS
2
17 1
18 2
19
ON THE OPTIMUM AUTOMATIC STEERING SYSTEM OF SHIPS AT SEA
8
20 0

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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2026