This map shows the geographic impact of Hiroshi Kohda'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 Kohda with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hiroshi Kohda more than expected).
This network shows the impact of papers produced by Hiroshi Kohda. 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 Kohda. The network helps show where Hiroshi Kohda may publish in the future.
Co-authorship network of co-authors of Hiroshi Kohda
This figure shows the co-authorship network connecting the top 25 collaborators of Hiroshi Kohda.
A scholar is included among the top collaborators of Hiroshi Kohda 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 Kohda. Hiroshi Kohda 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.
Mizukami, Hajime, et al.. (2003). RAPD Analysis of Ephedra Plants. Natural medicines = 生薬學雜誌. 57(2). 50–54.2 indexed citations
Suzuki, Yasushi, et al.. (2001). Evaluation of Valeriana Plants and Their Improvement for Crude Drug Production : 2. Diversity of Sesquiterpenoid Contents. 55(5). 225–230.1 indexed citations
4.
Suzuki, Shoichi, et al.. (2001). Evaluation of Valeriana Plants and Their Improvement for Crude Drug Production : 1. Phylogenetic Relationship in The Genus Valeriana as Revealed by RAPD Markers. Natural medicines = 生薬學雜誌. 55(1). 17–22.1 indexed citations
5.
Suzuki, Shoichi, et al.. (2001). Evaluation of Valeriana Plants and Their Improvement for Crude Drug Production : 3. F_1 Hybrids Production and Their Sesquiterpenoids Contents. Natural medicines = 生薬學雜誌. 55(5). 231–234.2 indexed citations
6.
Iida, Osamu, et al.. (1998). Random Amplified Polymorphic DNA Analysis of Angelica acutiloba and Its Varieties. Natural medicines = 生薬學雜誌. 52(2). 130–134.3 indexed citations
Kohda, Hiroshi, et al.. (1990). Propagation of Bupleurum falcatum by Shoot Tip Culture : Induction of Shoot Primordia. 44(1). 38–41.3 indexed citations
Rimando, Agnes M., et al.. (1987). Screening for Mast Cell Histamine Release Inhibitory Activity of Philippine Medicinal Plants. : Active Constituent of Ehretia microphylla. The Japanese Journal of Pharmacology. 41(3). 242–247.17 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.