Koichi Takeya
Impact in
- Toxicology top 0.2%
- Bioactive Compounds and Antitumor Agents
Papers in
-
- Natural Compounds in Disease Treatment 24
- Morinda citrifolia extract uses 19
- Pharmacology 46
- Pharmacological Effects of Natural Compounds 15
- Co-authors
- Hideji ItokawaHiroshi MoritaYukio HitotsuyanagiIchiro YasudaYöichi IitakaJun‐Ping XuOsamu ShirotaYutaka Aoyagi
In The Last Decade
Koichi Takeya
255 papers receiving 5.6k citations
Peers
Comparison fields: 5 of 126
- Toxicology 447
- Complementary and alternative medicine 994
- Pharmacology 983
- Horticulture 84
- Biochemistry 584
Countries citing papers authored by Koichi Takeya
This map shows the geographic impact of Koichi Takeya'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 Koichi Takeya with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Koichi Takeya more than expected).
Fields of papers citing papers by Koichi Takeya
This network shows the impact of papers produced by Koichi Takeya. 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 Koichi Takeya. The network helps show where Koichi Takeya may publish in the future.
Co-authorship network
The 25 scholars most cited alongside Koichi Takeya, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.
All Works
| # | Work | ||
|---|---|---|---|
| 1 | 2024 | 1 | |
| 2 | 2008 | 19 | |
| 3 | 2004 | 28 | |
| 4 | New Quinic Acid Derivatives from the Fruits of Chaenomeles sinensis (Chinese Quince) | 2001 | 10 |
| 5 | Antitumor compounds isolated from higher plants. | 2000 | 15 |
| 6 | Chemical Constituents from Dioscorea delicata(Natural Medicine Note) | 1999 | 1 |
| 7 | Limonoids from Citrus nippokoreana | 1999 | 5 |
| 8 | Cytotoxic Principles from Majorana syriaca | 1998 | 11 |
| 9 | Isolation of Antitumor Substance, Dulcitol, from Maytenus ebenifolia | 1998 | 2 |
| 10 | Cytotoxic Triterpene from Aster tataricus | 1997 | 10 |
| 11 | CITRAL : A CYTOTOXIC PRINCIPLE ISOLATED FROM THE ESSENTIAL OIL OF CYMBOPOGON CITRATUS AGAINST P388 LEUKAEMIA CELLS | 1997 | 8 |
| 12 | Quassinoids from Brucea mollis Wall | 1996 | 2 |
| 13 | Cytotoxic chemical constituents from Egyptian medicinal plant, Ambrosia maritima L | 1994 | 7 |
| 14 | $C_{18}$ and $C_{19}$ Quassinoids from Eurycoma Longifolia | 1994 | 1 |
| 15 | Screening Test for Antitumor Activity of Crude Drugs (IV) : Studies on Cytotoxic Activity of Israeli Medicinal Plants(News Letters) | 1994 | 7 |
| 16 | ANTITUMOR SUBSTANCES FROM SOUTH AMERICAN PLANTS | 1992 | 1 |
| 17 | Comparison of the Commercial Turmeric and Its Cultivated Plant by Their Constituents | 1992 | 8 |
| 18 | 1991 | 66 | |
| 19 | Screening test for antitumor activity of crude drugs (III) studies on antitumor activity of indonesian medicinal plants | 1990 | 5 |
| 20 | Studies on the Tissue Culture of Humulus lupulus L. and the Chemical Constituents | 1980 | 3 |
About Koichi Takeya
Koichi Takeya is a scholar working on Complementary and alternative medicine, Pharmacology, Horticulture, Toxicology and Biochemistry, having authored 260 papers that have together received 6.0k indexed citations. Recurring topics across this work include Natural product bioactivities and synthesis (77 papers), Phytochemical compounds biological activities (50 papers), Biological Activity of Diterpenoids and Biflavonoids (32 papers), Phytochemistry and Biological Activities (25 papers), Natural Compounds in Disease Treatment (24 papers), Morinda citrifolia extract uses (19 papers), Traditional and Medicinal Uses of Annonaceae (19 papers) and Pharmacological Effects of Natural Compounds (15 papers). The work is most often cited by research in Toxicology (447 citations), Complementary and alternative medicine (994 citations), Pharmacology (983 citations), Horticulture (84 citations) and Biochemistry (584 citations). Koichi Takeya has collaborated with scholars based in Japan, Malaysia and Brazil. Frequent co-authors include Hideji Itokawa, Hiroshi Morita, Yukio Hitotsuyanagi, Ichiro Yasuda, Yöichi Iitaka, Jun‐Ping Xu, Osamu Shirota, Yutaka Aoyagi, Mário Motidome and Etsuko Kishi. Their work appears in journals such as Chemical and Pharmaceutical Bulletin, Phytochemistry, Journal of Natural Products, Tetrahedron and Tetrahedron Letters.
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.