Isao Kouno

7.8k total citations · 1 hit paper
184 papers, 6.5k citations indexed

About

Isao Kouno is a scholar working on Molecular Biology, Plant Science and Biochemistry. According to data from OpenAlex, Isao Kouno has authored 184 papers receiving a total of 6.5k indexed citations (citations by other indexed papers that have themselves been cited), including 111 papers in Molecular Biology, 65 papers in Plant Science and 40 papers in Biochemistry. Recurrent topics in Isao Kouno's work include Natural product bioactivities and synthesis (80 papers), Phytochemistry and Biological Activities (52 papers) and Phytochemicals and Antioxidant Activities (40 papers). Isao Kouno is often cited by papers focused on Natural product bioactivities and synthesis (80 papers), Phytochemistry and Biological Activities (52 papers) and Phytochemicals and Antioxidant Activities (40 papers). Isao Kouno collaborates with scholars based in Japan, China and Hong Kong. Isao Kouno's co-authors include Takashi Tanaka, Yosuke Matsuo, Toshitsugu Taguri, Ying‐Jun Zhang, Zhi‐Hong Jiang, Toshihisa Ueda, Nobusuke Kawano, Chong‐Ren Yang, Gen‐ichiro Nonaka and Chie Mine and has published in prestigious journals such as PLANT PHYSIOLOGY, Chemical Communications and Journal of Agricultural and Food Chemistry.

In The Last Decade

Isao Kouno

181 papers receiving 6.3k citations

Hit Papers

align trajectories

What are hit papers?

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.

Facile Discrimination of Aldose Enantiomers by Reversed-Phase HPLC

2007 758 citations Takashi Tanaka, Isao Kouno et al. Chemical and Pharmaceutical Bulletin profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Isao Kouno Japan	43	2.9k	2.1k	1.9k	1.4k	1.2k	184	6.5k
Ramadasan Kuttan India	47	2.3k 0.8×	1.9k 0.9×	1.2k 0.7×	880 0.7×	892 0.8×	136	8.0k
Toshio Miyase Japan	49	4.8k 1.7×	3.3k 1.6×	1.3k 0.7×	1.1k 0.8×	1.0k 0.9×	236	8.2k
Itsuo Nishioka Japan	53	4.8k 1.7×	3.5k 1.7×	2.7k 1.5×	1.1k 0.8×	1.4k 1.2×	342	10.2k
Robert T. Rosen United States	45	1.6k 0.6×	1.5k 0.7×	1.4k 0.7×	575 0.4×	1.1k 0.9×	95	5.3k
Gen‐ichiro Nonaka Japan	51	3.7k 1.3×	2.3k 1.1×	2.7k 1.4×	1.1k 0.8×	1.2k 1.0×	242	8.2k
Denís Barron France	45	3.0k 1.0×	1.2k 0.6×	1.8k 1.0×	801 0.6×	626 0.5×	130	6.3k
Takuo Okuda Japan	47	4.1k 1.4×	3.1k 1.5×	3.7k 2.0×	919 0.7×	1.9k 1.6×	235	10.0k
Antonio González‐Sarrías Spain	52	2.5k 0.9×	2.1k 1.0×	2.6k 1.4×	856 0.6×	758 0.6×	105	8.0k
Shigenori Kumazawa Japan	40	1.4k 0.5×	1.3k 0.6×	1.7k 0.9×	686 0.5×	2.4k 2.0×	157	6.2k
Tsutomu Hatano Japan	62	5.3k 1.8×	4.0k 1.9×	4.2k 2.3×	910 0.7×	2.7k 2.3×	283	13.1k

Countries citing papers authored by Isao Kouno

Since Specialization

Citations

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

Fields of papers citing papers by Isao Kouno

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Isao Kouno

This figure shows the co-authorship network connecting the top 25 collaborators of Isao Kouno. A scholar is included among the top collaborators of Isao Kouno 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 Isao Kouno. Isao Kouno is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Xu, Min, Hongtao Zhu, Rongrong Cheng, et al.. (2016). Antioxidant and hyaluronidase inhibitory activities of diverse phenolics in Phyllanthus emblica. Natural Product Research. 30(23). 2726–2729. 24 indexed citations

Matsuo, Yosuke, et al.. (2013). Structures of enzymatic oxidation products of epigallocatechin. Tetrahedron. 69(42). 8952–8958. 11 indexed citations

Nakayama, Hideyuki, et al.. (2011). HPLC and HPLC-TOFMS analyses of tea catechins and teadenols. 18(2). 116–121. 4 indexed citations

Tanaka, Takashi, Yong‐Lin Huang, Yosuke Matsuo, et al.. (2011). New Phenylpropanoid-Substituted Flavan-3-ols from the Leaves of Castanopsis sclerophylla. Heterocycles. 83(10). 2321–2321. 12 indexed citations

Huang, Yong‐Lin, Takashi Tanaka, Yosuke Matsuo, et al.. (2011). Triterpene hexahydroxydiphenoyl esters and a quinic acid purpurogallin carbonyl ester from the leaves of Castanopsis fissa. Phytochemistry. 72(16). 2006–2014. 24 indexed citations

Huang, Yong‐Lin, Takashi Tanaka, Yosuke Matsuo, et al.. (2011). Two new phenolic glucosides and an ellagitannin from the leaves of Castanopsis sclerophylla. Phytochemistry Letters. 5(1). 158–161. 16 indexed citations

Tanaka, Takashi, et al.. (2010). New iridoid diesters of glucopyranose from Linaria canadensis (L.) Dum.. Journal of Natural Medicines. 65(1). 172–175. 10 indexed citations

Huang, Sumei, et al.. (2008). Chemical constituents of green tea extracts fermented with Penicillium, Fusarium or Rosellinia. 15(2). 84–88. 2 indexed citations

Zhao, Ping, et al.. (2008). Caffeoyl arbutin and related compounds from the buds of Vaccinium dunalianum. Phytochemistry. 69(18). 3087–3094. 47 indexed citations

10.

Shuaibu, Mohammed Nasir, Tetsuo Yanagi, Kenji Hirayama, et al.. (2007). Trypanocidal activity of extracts and compounds from the stem bark of Anogeissus leiocarpus and Terminalia avicennoides. Parasitology Research. 102(4). 697–703. 64 indexed citations

11.

Tanaka, Takashi, et al.. (2004). New black tea polyphenol having -ethyl-2-pyrrolidinone moiety derived from tea amino acid theanine: isolation, characterization and partial synthesis. Food Chemistry. 93(1). 81–87. 55 indexed citations

12.

Tanaka, Takashi & Isao Kouno. (2003). Oxidation of Tea Catechins: Chemical Structures and Reaction Mechanism. Food Science and Technology Research. 9(2). 128–133. 106 indexed citations

13.

Zhang, Ying‐Jun, et al.. (2001). Novel Sesquiterpenoids from the Roots of Phyllanthus emblica. Journal of Natural Products. 64(7). 870–873. 38 indexed citations

14.

Jiang, Zhi‐Hong, Takashi Tanaka, & Isao Kouno. (1999). Euphane-Type Triterpene Tridesmosides from the Leaves of Rhoiptelea chiliantha.. Chemical and Pharmaceutical Bulletin. 47(1). 101–103. 1 indexed citations

15.

Jiang, Zhiyong, et al.. (1998). [Studies on tannins from Tripterygium hypoglaucum (lévl.) hutch].. PubMed. 23(9). 549–inside back cover. 1 indexed citations

16.

Tanaka, Takashi, Zhi‐Hong Jiang, & Isao Kouno. (1998). Distribution of ellagic acid derivatives and a diarylheptanoid in wood of Platycarya strobilacea. Phytochemistry. 47(5). 851–854. 45 indexed citations

17.

Jiang, Zhi‐Hong, et al.. (1997). The first euphane-type triterpene tridesmosides and bisdesmoside from Rhoiptelea chiliantha. Tetrahedron. 53(50). 16999–17008. 13 indexed citations

18.

Kouno, Isao, et al.. (1991). Two sesquiterpene lactones from Illicium anisatum. Phytochemistry. 30(1). 351–353. 19 indexed citations

19.

Kouno, Isao, et al.. (1990). Structures of anislactone A and B; Novel type of sequiterpene lactones from the pericarps of Illicium anisatum.. Chemical and Pharmaceutical Bulletin. 38(11). 3060–3063. 36 indexed citations

20.

Kouno, Isao, Ayako Hashimoto, Nobusuke Kawano, & Chunshu Yang. (1989). New sesqui-neolignan from the pericarps of Illicium macranthum.. Chemical and Pharmaceutical Bulletin. 37(5). 1291–1292. 32 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.

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