Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
13C nmr study of α- and β-anomeric pairs of d-mannopyranosides and l-rhamnopyranosides
1979382 citationsR. Kasai, Kenji Mizutani et al.Tetrahedronprofile →
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late)
cites ·
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This map shows the geographic impact of R. Kasai'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 R. Kasai with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites R. Kasai more than expected).
This network shows the impact of papers produced by R. Kasai. 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 R. Kasai. The network helps show where R. Kasai may publish in the future.
Co-authorship network of co-authors of R. Kasai
This figure shows the co-authorship network connecting the top 25 collaborators of R. Kasai.
A scholar is included among the top collaborators of R. Kasai 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 R. Kasai. R. Kasai is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ohtani, Keishi, et al.. (2000). Triterpenoidal saponins from Cornulaca monacantha.. PubMed. 55(6). 460–2.3 indexed citations
5.
Ramadan, Mahmoud A., Mohamed Salah Kamel, Keisuke Ohtani, R. Kasai, & Kazuo Yamasaki. (2000). Minor phenolics from Crinum bulbispermum bulbs. Phytochemistry. 54(8). 891–896.40 indexed citations
Nham, Nguyen Thoi, et al.. (1995). Pharmacognostical and chemical studies on Vietnamese ginseng, Panax vietnamensis Ha et Grushv. (Araliaceae). 70(1). 1–10.8 indexed citations
Ohtani, Keisuke, Kenji Mizutani, & R. Kasai. (1987). RETICULOENDOTHELIAL SYSTEM ACTIVATING POLYSACCHRIDES FROM PANAX SPECIES: P. NOTOGINSENG, P. GINSENG AND P. JAPONICUS. Journal of Pharmacobio-Dynamics. 10(3). 63–63.2 indexed citations
Kasai, R., et al.. (1984). かん国薬用植物,Acanthopanax chiisanensis(ウコギ科)から得た新しい3,4‐セコトリテルペンの配糖体エステル. Chemical and Pharmaceutical Bulletin. 32(3). 1244–1247.3 indexed citations
Tanaka, Osamu & R. Kasai. (1984). Saponins of Ginseng and Related Plants. Fortschritte der Chemie Organischer Naturstoffe/Fortschritte der Chemie organischer Naturstoffe/Progress in the chemistry of organic natural products. 46. 1–76.54 indexed citations
Kasai, R., et al.. (1979). 13C nmr study of α- and β-anomeric pairs of d-mannopyranosides and l-rhamnopyranosides. Tetrahedron. 35(11). 1427–1432.382 indexed citations breakdown →
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.